So it's a devoted/enchanter...
And by giving up transmutation, I guess you are not interested in Combusting Wounds + Clear Out with AoE weapon (like WotEP or Citzal's Lance).
It's a quickly self-buffing, single-target, melee damage dealer who spams Penetrating Strike while he has discipline and starts auto-attacking afterwards.
I guess there are two routes then:
v1. battle axes, as their modal will prove useful during boss fights; while vs regular enemies you will be able to crit more often and get some returns from extra onCrit damage coefficients.
v4. blunderbusses, as they generally have more base damage and also provide some AoE option with mortars in off-set.
P.S. But be warned: there are not that many active abilities here, so it might get somewhat repetitive.
Also: wizard seem to provide only self buffs and fireball. Do these self buffs really out-weight what a paladin, rogue, or monk could bring to such a character?