Guild Wars 2

We’ve been doing this fight for 2 hours, she regens way too fast & we’re still in the fight now.
Could some one please explain what we have to do? We’re running 4 sparks & letting her regen, then throwing the 5th one in to break her out immediately, but she just hops back to invis & regens far too much HP to recover. I can’t believe this can go since release without getting fixed, but I guess its so horrible the devs don’t even want to touch it.
Please, any tips would be great. We can’t kite Simin to his spot where she glitches out, or anything either apparently.
How do we do this?
mesmer x2, war, guard, thief

Guys on sparks, have speed buffs, movements skills, blinks and switfness of course, guy with 3 sparks should be ready by the time she stealths to start pulling 3, guy with 2 sparks shud be done before the other gets there. Sparks follow in a straight line. Rest stay out of the way.

Timewarp after 4-1 to give u more running time for sparks, potion of undead slaying helps ALOT, 50% more damage to simin if all players equip

Zogyark.4597:

Guys on sparks, have speed buffs, movements skills, blinks and switfness of course, guy with 3 sparks should be ready by the time she stealths to start pulling 3, guy with 2 sparks shud be done before the other gets there. Sparks follow in a straight line. Rest stay out of the way.

Timewarp after 4-1 to give u more running time for sparks, potion of undead slaying helps ALOT, 50% more damage to simin if all players equip

You fail at maths but otherwise speak true.

Still trapped at this hilarious excusing for coding. We have 2 Guards 1 mes, 1 war, 1 thief now; and we’re pushing power with everything we can consume.
This is the opposite of fun. Sparks are aggroing to the most random things (summoned birds for example). This is horrible.

Perhaps magic find is not optimal stat for this encounter.

We managed to finish it finally; that was one heck of a boss fight… Kinda weird only getting 60 shards for that, despite it taking longer than the other 3 paths combined & also being harder than everything else by a mile.
Welp, here’s another Dungeon Master joining your ranks.