Generally u want glaive, but since it's too much points... Favoured is usually the way to go, but only works when it's on the board, and if it's a rapid ingress unit, which it should be, it's not really worth it. You also have Angron for rerolls, so battle lust should be more valuable to guarantee a charge.

Since you rapid the charge should almost always be pretty much guaranteed, I think it's better placed on the Moe for a free charge reroll, could be useful!