Who to replace Brienne with, now that I have Boldtusk?

I recently got Boldtusk, got his special maxxed out, so I’m thinking it’s time to remove Brienne from my team, since their buffs don’t stack, and they just keep overwriting each others buffs, and she dies pretty quick.

I don’t have any 4+ greens.

Who would be best to replace her? I have: Needler, Isshtak, Carver, Belith (but boldtusk already heals, so), and derric and aife. I’m leaning towards Carver due to the mana reduction might be helpful in some nodes and PVP.

Any help is appreciated. Thanks.

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