Well if the skills are amazing, we would see Braver more as a sub on classes with stronger weapons. If the weapons are amazing, we'd see Br/Hu or Br/Ra. If they get Weak Bullet, even Gu/Br would be viable.
I'd like to see easy access to the defining skills, with large universal bonuses near the top of the tree. Further down you would unlock small bonuses for only one damage type (like one 10% for each).