FF12 Boss help

Ok, the boss Ahriman is...tossing me like a rag doll. my guys can't take the guy on after the monsters draining my MP before fighting him

Frankly, is there a way of beating him with little effort
?

A quickening chain is out if your MP is drained. I would check out GameFAQs as I can't recall the boss but the recommended level sounds about right for that stage of the game. If it's the boss that can split himself attack the weak 'fakes' first via a gambit Foe: HP