BoA weapons are most useful when you are solo, in my opinion.

My DK+4xRet team is now Level 78-80, and they didn't use any BoA weapons, just quest rewards and Blue dungeon drops. I got 5 Ingvar's cleavers, 5 trollbanes, and 5 weapons from the Ring of Blood/Amphitheatre of Anguish quests.

I also went without BoA XP-boosting chests on 3 of the characters, which is why they ended up from 78-80.

Being able to utilize runeforging is a nice plus, but it honestly doesn't matter a whole lot. Get to L80 as efficiently as possible and then put in the time to properly gear them out...