first add:
prepare a combo'd rage of halone on melusine, walk to the spot where the add spawns. have a feeling for the spawn (like back then at t4, when soldiers/knights spawn), flash once (the name of the mob appears first, before the mob itself spawns ), fire off the combo'd halone. now you shoudlnt have aggro issues.
--> tip: use the debuff of RoH as an time indicator for next step

if dps is slacking a bit and first add isnt dead fast enough, start walking to the next spot when the add has like 5-10% hp left. because it will def die soon.

2nd add:
flash when it appears, non combo'd RoH on it, start emnity rotation = you dont have aggro issues.
--> tip: you can start a RoH on mob, face away from center with voice on you and still land the RoH

if dps is slacking, see above.

3rd add:
basicly the same like 2nd add. sometimes (depending on shriek mechanic) you aren't in range of the 3rd add fast anough, throw a lob during running to the mob and flash asap, followed by a non combo'd RoH = no aggro problems.


final tip:
sometimes its better for the dps to w8 1.5-2 seconds before unloading all their dmg and kill the mob safe than unloading everything they got asap, causing aggro ping pong and a wipe.