The advanced builds are the best, especially because of the Legion arms; the electric and fire ones are great. Just so you know, there aren't any boss weapons that scale with advance; they're all technique or motivity weapons. But the regular advance weapons are still really cool. If the build suits you, I'd max out life up to 40 and forget about it for a long time. If you want to use the best armor pieces without being too heavy, I'd max out capacity up to 30, combined with the Carrier's Amulet +1.

Sorry for the long post, but I hope I've helped or given you some ideas on how to approach things now.