Well, let’s go boss by boss.
VG will be ez pz. You can just stack up phantasms and let it go. Have one or two on mantra heals for sustain, a couple foci for seeker control.
Gorseval
Gorseval has some nasty stuff for mesmers. First annoyance will be killing the adds before an updraft. With pulls it’s not too much of an issue potentially, but sometimes pulls bug out and don’t properly yank the adds. If that happens, killing all of them could be challenging.
Then you’ll run into the charged spirits phase. This will be really slow due to the Mesmer reliance on phantasms. The best way would probably be to put 2 mesmers on each one so that they can stack up phantasms and not have to target switch. It should be doable, but it’ll be rather slow.
Then we get into the second gorse phase. Things get sorta hairy here because of orbs. I’m thinking you’ll need to have several people with mantra of pain dedicated to orb clearing, but that might not be enough, it’s hard to say. If you’re able to handle the orbs and still make the dps check though, this should be a doable fight.
Sabetha
This one is going to suck. Sabetha herself shouldn’t be too bad, nor will the other bandits be awful, but swapping from one to the next will cause massive drops in dps. Cannons will be the worst though. It might be possible to 1shot a cannon will a full glassy burst shatter…but I doubt it. You’ll need to spend far more time than usual killing cannons.
This fight should be possible though, it’s just that the cannon folks will have a really bad time of it. Karde will also be a pain due to the flame turrets he spawns, so you may need some concentrated MoP attention to handle those.
Slothy
This should be fairly easy, all things considered. You just set up condition removal between everyone, some mantra heals, some reflects, and a bunch of dps phantasms.
Trio
This will be potentially miserable. Mesmers are not known for their trash clearing expertise…and there is a lot of dangerous trash in this fight. There’s a dangerous possibility of trash stack up to a raid wipe if the entire group isn’t heavily specced for aoe clearing damage. The whole raid will need to be super on top of pulling mobs in and cleaving them down.
There’s also a bit of an issue with the flamethrower boss…the only way for Mesmer to ignite those barrels is the prestige. This poses a conundrum for the group. Ideally, you only want 1 person with torch because it’s such a miserable weapon. On the other hand, if that one person dies…you’re hosed. You’d probably want 2 people with torch just to be safe.
Matthias
Matthias shouldn’t be too bad actually. The main annoyance here is that every sacrifice will brick the dps of that person for a bit. Judicious use of the heal signet will ameliorate this, but it’ll still be annoying. This fight will need to be pretty heavy on mantras for sustain and condie cleanse as well, since there’s a lot of damage pressure and condies that come out in the rain phase.
Escort
Meh, doable. Might take a while, but w/e. Honestly, the boss will be a right pain in the kitten . Every time he splits, everyone’s phantasms will pop. What a miserable fight.
Keep Construct
This fight could potentially be really hard for multiple reasons. The biggest problem throughout the fight is that you have to constantly kill new targets. Unless you’re in a burn phase, killing the phantoms is more important than dpsing KC himself, and that means you’re target swapping every 25-30 seconds.
Additionally, the slow buildup of Mesmer damage will have 2 really nasty effects. The first effect is that it will be potentially impossible for the group to kill the first phantom before the second phantom arrives. This means you’ll need to kite it around a bit instead of just pushing dps like normal. The swap to damaging the second phantom will also be really slow, so you’re potentially looking at dealing with 2 full mechanic cycles from KC before each burn phase.
Orb phase should be easy, but then you get into the burn phase. This is really nasty actually. Recall that during the orb phase, phantoms are still spawning. This means that everyone in the raid has to be burning cooldowns to maintain the dps on those phantoms to prevent them from combining. However, the burn phase is essential to instantly burst out with full dps, meaning you need all those cooldowns. There’s no way you’ll be able to 1shot the burst phase 33%, and that makes this fight really dangerous.
So let’s stack it all up. I’m expecting you’ll need to deal with 2 full mechanic cycles per burn phase. You’ll need 2 burn phases per 33%. This means you’re looking at needing to do twice as many burn phases as a normal group, you’ll have to deal with at least twice as many mechanic cycles, and you’ll have to deal with mechanic cycles in the very dangerous last 33% phase.
Honestly, KC might be the very hardest boss. I could be overestimating how hard it’ll be to dps things down in this fight, but I don’t think I am. This one is nasty, make no mistake.
Xera
Lastly, we’ve got Xera. The bloodstone shard platforms are going to be a right pain in the kitten to kill with our slow damage buildup, but it should be doable. Similar to Gorseval, this fight will need probably 3 or more people with MoP to handle shards on the arena. Heavy condie control will be required, potentially to the point of stacking up maybe 2-3 disenchanters on Xera so that you can focus on other things mid-fight.
Add control will be a challenge on this fight too. You’ll need several mesmers with focus for pulls, and potentially one or two specced for shatter to actually kill the adds.
This fight will be tricky, but I think it should be doable. As long as MoP can clear shards fast enough (this might be difficult honestly, I’ve never tried shard clearing with MoP for obvious reasons), then it’ll be challenging but doable, given a good tank of course.
Overview
VG: Easy
Gorseval: Challenging but probably doable. Dps check will potentially be a problem, running out of time will potentially be a problem.
Sabetha: Annoying but doable.
Slothy: Easy
Trio: Challenging but doable. Add clearing is the major challenge, and you have to kitten yourselves with a couple torches.
Matthias: Doable
Escort: Doable but really annoying on the final fight.
Keep Construct: Extremely challenging. Probably doable, but will be extremely dangerous and extremely difficult.
Xera: Very challenging but doable.
Especially VG should be totally fine, even easy.