Given that you won't be taking many actives, a Black Jacket/Troubador would be a lot of fun. A stat distribution similar to what you used on your Intelligent Captain would work pretty well; you could consider dropping res a couple of points for more might or dex if you wanted? More dex = faster item use I guess?
Similarly, a high per/high int ghost heart ranger is a lot of fun; I just ran one as a multi with Ascendant cipher (focusing on marksmanship with my arquebus and using charms to even the odds in tough battles; I think someone has a build on here like that too). Doing a ghost heart/troubador might be really fun. Lots of synergy with the ranged buff chant and the damage chant, and you could maybe focus on knockbacks/paralyze/etc. for foes that get past your pet's engagement. Add in a few buffs from party members and that'd be really flavorful. If you really limited the active slow-cast stuff on the chanter side in favor of passives and a few situational things, you could focus on dex/per/int/might and leave con and res at 10, I'd think. Could maybe even dump them a little bit lower.