Yeah, I really don't know what to put in the 5th slot, Cipher doesn't seem to completement this build. Double paladin and triple chanter would already buff my MC to make me feel like the hero of the story (which is what I'm aiming with the composition), plenty of heals and already a resource recovery from chanter. Most likely Ancient it is. For summons I did try to limit myself on the current run, but the mega bosses really needed some weapon summoning...
What ranged weapon would be good for a ranged chanter to keep them decently close to the front liners? I tried double blunderbuss (Kitchen Stove + Xefa's) on a cipher on current run, it kept damaging the tanks, I'm quite afraid it would be the same with chanter. Would Hand Mortars be a similar nuisance?