If it doesn't summon or out-regen chants, you can solo it.
If you can reliably mez it, you could melee/dot/whatever it and mez lock while slowly regening.
If there are mobs you can charm and send against you can kill it. Summoning mobs would make this difficult.
If you can charm IT and send it against other mobs - again you can kill it.
Basically if it summons you'll have a hard time. With great gear and expendables, the number of trophy mobs possible goes way up - but still nowhere close to what a shaman or ench can pull off.
Bard with puppet strings could probably pull off some nice kills.
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