You need 180% Repair skill to take Armorer[3].If you are not planning to do so better spend some points on Doctor, First aid or outdoorsman.
Well, with CH3 i wouldn't worry about carry weight, since you can tam brahmin or hire some merc and offload all crap to him, but i guess i would rather have more INT than PE (but, this is my preference) since for BG weapons 1 PE = +8% accuracy, 1 INT = +12% accuracy (depending on skill range) + some skill points left, however this lowers your sight range...