You need 3 things that are really helpfull (2 at least) to have a good fractal T4 experience 1) Healing provided by Druid (we all know it)Tempest RenegadeYes there's not only druid that can heal ... actually ... tempest and renegade heals better but druids provides more things such as might and spirit buffes.2) Might especially provided by Druid (recent "stupid" buff)Renegade (press 1 skill to perma 25 stacks with concentration .... low radius)Phallanx warrior but got nerfActually almost every class can gain a lot of might if they spec .... but most of the time it's selfish.3) Quickness (but not really a must have even if it's really helpfull) ChronomancerFirebrand (can give a lot of aegis and blocks + some sustain and boons)TBH i don't know what other specs can give that much quickness ... if you have something else , be sure to make me notice ! My point is : you don't necessarily need a raid comp, some of other classes performs way more efficiently in a 5 man party than raids ones since it's only 5 ppl.