Current I'm not using a pvp trinket because my buddy and I were too low for it to matter in our 2's (fun team of shadow/disc) & I had a whole 1300ish resil when we started (I wore mostly pve gear) but we're approaching 1600 now and I'm sitting at 2600 resil (still a couple pieces of pve gear) so I'm thinking that I need to start using a pvp trinket. My problem is I'm not sure which one to give up. I'm currently using DMC:Volcano and Theralion's Mirror. Which one should I give up to put my pvp trinket on?
Replace the mirror.
You shouldn't have mana issues if you manage your cooldowns properly and don't just spam dots that will get dispelled (meaning dot up either when the dispeller is CC'd they are pressured enough so that they don't have time to dispel)