Id really like to use one of them summoned pets in pvp, more specificly the twilight matriarch. In 1v1 it works pretty well, the heal from it and the dmg it does is quite ok. I sometimes use it and I like it alot.
But when it comes to group pvp, it is utterly useless, it wanders off, even if I dispel it and resummon, it will wander off into the nothingnesswhoknowswhere...or just stand around sucking on its thumb.
First step would be to give them 2 modes, offencive and defencive, the defencive mode would make it never leave your side, attacking the target you are attacking.
PC EU
PvP only