Condition Bomber Support

something with [rend enchantments]/[gaze of contempt] is going to tear you apart. also as phan says a RC is just going get a bigger heal. not worth it imo since you can shadow step from outside of cast range it is possible to send mes (+plus support from rest of team) in to cast FD and fragility first then you shadow step in. Casting RE or GoC isn't going to hinder you much as the whole point is you lose your enchantments next to enemy to release the end effect conditions. you'd just lose the earth damage

once you've bombed as the derv though you're quite vulnerable so it might be worth taking a shadow step to a target ally while you wait for your enchantments to recharge

as for RC and other condition removing spells the mes could bring [confusing images] or [arcane conundrum] plus some interrupt skills (esp with disabling bonus) or an interrupt ranger to shut down the healers. [signet of humility] would also work well, possibiliy take [mantra of inscriptions] if you want to keep it up

as for helping other characters, just quickly off the top of my head an earth ele can take advantage of [stoning][glowstone] without having to use [ebon hawk] or [enfeeble], therefore keeping the second profession open for utility or a hard res. Also an assassin can run trampling ox without Palm Strike if they want to use another elite instead (yes palm strike is good, but it is also boring with so many running it ).

It may also be useful to take a guaranteed condition on one or two characters as well though such as [enfeebling blood] in case of successful removal from all team members.