The key to this encounter is co-ordination, the bosses are not that tough, but they aren't going to line up in order to be killed like the other encounters, so listen to your group members and be prepared to move as needed.
The encounter is in three phases, first liberate the city, second secure the city, third defeat the king.
The encounter takes place in a copy of mos espa, to enter the encounter first talk to the tusken in the adventure hall in aurilia, run the simple missions he gives until you are told to warn the militia leader, that is the start of the instance. Kav (the militia leader) is based in the university forecourt and talking to him will get access. NB: Everyone in the group must have done the pre-quests, this is not like HK where only one person needs access. Also note if you are late and the group left without you, have the leader invite you from inside the instance and head in. It may be helpful to have a copy of the map below handy during the mission, especially for anyone handling the experts (see below)
In phase 1 you and the team will spawn to the east of the city (top of the map). Tuskens will be roaming around the city at this point, the objective first is simple:
REACH THE CANTINA (A1 on the map)
Do not stop, do not pass go, do not collect £200 (or $200 for our american cousins, or 200 for our friends over the channel, or whatever currency you use!) In other words jump on a speeder and ignore the tuskens between you and the cantina.
Once in the cantina clear it, one boss inside, but he's a push over. A few seconds later Kav will walk in and turn into a boss. Now for the main part of phase 1, the group here splits into two teams.
Team 1 consists of one medic and two others. Their job is simple - keep Kav alive. Waves of one elite and some normal tuskens will arrive in the cantina with the aim of nuking him. Kav isn't a push over tho, against one wave he can even hold his own, he'll get beaten if two waves arrive together or one wave arrives before the first is beaten (he heals great out of combat) but best to just kill the tuskens. Oh, and if you have a toon who hasn't yet reached 90, defending the cantina is great for xp! Often this group will split one toon each door, with the medic moving between, but that's up to you.
Team 2 consists of everyone else. Their job is to go around the 7 buildings listed in the mission journal and clear each of tuskens. There are bosses in each building, so keep the group together and pound on the invaders and you'll soon have liberated the city. My personal order for the buildings is University, Med Centre, Hotel, Cloning Centre, Combat Hall, Watto's, Starport (A2-A8 on the map). Some like the starport first, I prefer it last for two reasons, 1- it has two bosses, so warm the group up on easier buildings first 2- it is closer to the hotel which makes killing the bosses there at the start of phase 2 easier before the first attack.
That's the easy bit over with, the team now need to re-organise and take on new roles for phase 2:
1) Building guards - there are three key buildings,
the first is the Mansion, to the south of the city (B1),
second is the lone house (B2),
third is the slum near Watto's (B3).
Each building needs one guard. They have to remain within 50-100m of the building at all times. Kav will announce when attacks are to happen, a few seconds later "Tusken fleshrippers" spawn and it is the guards job to intercept before they reach the building (they spawn within 20m of the building) and maintain aggro. The reason for this is that as well as the experts who spawn in the building so will a number of "a citizen" mobs. These idiots figure going for a stroll in the middle of a battle must be safe (after all C-3PO and R2-D2 seemed to be able to do it!) and will calmly stroll to the hotel from their building.
If while on their nice little stroll they see a tusken near enough, they figure a quick bout of fisticuffs is in order, unfortunately they never bothered to train novice brawler much less anything else so the average tusken will eat them alive, and a warlord barely has to look and they drop dead from fright!
IF 10 CITIZENS OR EXPERTS DIE YOU LOSE.
2) Expert controller - this person is the only person to talk to "an expert". Experts spawn in the buildings above (note in the slum they are only on the top floor, in the lone house they are on the bottom floor and in the mansion they are on both the top floor AND the roof. The expert controller's job is to guide experts in to the six buildings that need staff. Each building needs three experts before it is fully manned. In order of how beneficial they are to you the buildings are:
A6 Combat hall - Spawns Elite "militia" mobs who will help defend the city, two of them can cope with a single boss tusken, so this should be the first priority building.
A3 Medical Centre - spawns elite "Doctor" mobs, assists other defenders and citizens (arguable whether better or not than militia, basically depends which building spawns experts first - mansion or lone house do med centre, slum do combat hall)
A2 University - Generates tusken bane buff which enhances group effectiveness (50% crit chance + other effects, nice buff)
A8 Starport - we haven't directly observed this, but have been assured the Y-wing is spawning and attacking tuskens around the city using officer special animations.
A5 Cloning Centre - grants a buff which activates effect on incap (gives heal and defensive boost).
A7 Watto's - Spawns non-elite droids around the city (low priority as they can't help much but they try)
Experts will spawn in each of the three properties when Kav says the building is under attack. The expert controller has to talk to the experts out of combat, so either needs to be a profession capable of reliably exiting combat or just be careful not to get tangled up with the fight which will be happening outside the building.
NB: Experts will only converse when you use the radial menu, clicking on them will try to shoot them (even tho the converse icon is displayed). This unfortunately is a side effect of allowing other npc's to attack the experts and so there is no known cure for this.
NB: It is possible to change an experts target building on route, but they will normally walk back 10-20m before heading to the new target. Changing building can be a way to "pause" the experts if a warlord is ahead and there isn't help from the floating team nearby.
NB: The buffs appear to be short term, it will refresh as long as you are in the instance.
3) Floating team - this leaves 4 team members, their job is to be Muhammed Ali around the battlefield, floating around like butterflies between the buildings and around the citizen
Red lines these are the paths that tusken berserker's and warlords take in to the city there be 4 -5 berserkers 1 warlord per group they walk the same paths as the experts as they travel to there locations so you have intercept each group
Yellow Linesthese are the paths the experts take to each loaction you can follow them on the over head map and as you can see there are tusken groups heading these paths as well
Blue boxall mos espa citizens will travel from the 3 locations here they follow the same paths as the experts
if you keep the red line area's clear you should have little trouble completing this phase we have done this now 2 times with no lose of citizens and 3-4 times with only 1 loss