Playing with a full custom party on Unfair since level 2 (modified a save game to get enough gold to afford 5 Mercs), shit's pretty fun, if a little frustrating. Since I've already cheated by adding gold, I didn't want to munchkin the characters too much, so most of them are relatively vanilla, not counting some Feats from Eldritch Arcana and Advanced Martial Arts.
PC - Pure Sword Saint (thanks
Haplo ) with a Dueling Sword (the Sword Scion Trait from one of the mods gives a +1 bonus to attacks with Dueling Swords, on top of all the other bonuses), DEX/INT. Pretty decent and versatile damage for all situations but the main benefit is that she's really durable in a fight, even more so than the uber-tank Valerie from my last playthrough. She is, however, very buff-dependent for now, which made the very early game a real bitch due to short durations. On the other hand, in Verdant Chambers at level 8, I did manage to solo the first 3 creatures Nyrissa spawned with minimal preparation, which I consider pretty great given that an Unfair Owlbear has something like 26-27 AB and a bajillion HP.
Merc 1 - Fighter 1/Thug 1/Bard rest, STR/CHA. Primarily a buff bot that is also capable of dealing decent melee damage and can occasionally
really wreck someone's day if they have a low Will save (looking at you, Stag Lord and Hargulka). With Intimidating Prowess and Skill Focus - Persuasion, one of the biggest benefits of this dude is that he keeps enemies in an effectively permanent Shaken (or worse) state for that beautiful -2 penalty to Saves.
Merc 2 - Pure Arcane Bloodline Sorc. Nothing much to say, with max CHA and with Greater Spell Focus in Conjuartion, Illusion and Evocation, this dude is a beautiful CC-bot keeping enemies locked down and lowering their AC considerably with Prone, Blind etc. Stinking Cloud is, of course, the real MVP for now. I'm getting to the point where Evocation spells can potentially start causing real pain too, what with Metamagic Rods and all. I fell for the Necromancy trap last time around, not doing it again.
Merc 3 - Pure Ecclesitheurge of Irori, WIS/CHA. Irori was picked mostly due to LARPing purposes rather than any real mechanical benefit. Nothing much to say, with the Healing Domain, this is a pure healbot that can keep the party alive forever and protect them from any and all negative conditions.
Merc 4 - Fighter 2/Vivisectionist else, DEX/INT/STR. This dude fucks. The 2 early Fighter levels enabled me to get all the necessary archery feats quickly while giving a decent boost to BAB. The Vivisectionist part lets me have absurdly high DEX, some useful additional buffs for the PC and of course, the lovely, lovely Sneak attack. Sometimes it's a pain to set it up properly, but it's all worth it when you start seeing the huge damage numbers float. Also, dude to high DEX, there's nothing he can't unlock or disarm.
Merc 5 - Pure Monster Tactician of Gozreh, STR/WIS. Needed a Deity with Animal Domain but which also allows Evil worshipers, because fuck Good and Neutral-aligned high-level summons. Anyway, she's a fairly standard Pokemaster character. Summons a ton of empowered minions, has a trusty Boon Companion-boosted Smilodon and a big-ass Longspearr + Enlarge Person to stay away from the fray because she's squishy as hell. My PC also has the Outflank and Precise Strike Teamwork Feats, so they work quite well as a tandem (pretty good damage too). It's a bit of a pain that I'm gonna have to waste a Feat to get her Martial Weapon Proficiency, though, since I don't recall seeing good Longspears in the game and will have to switch to Glaive. Ultra-high Perception and Lore (Nature) are fantastic as well.
tl;dr - Having way more fun than the previous Kineticist + regular companions run, even though I had to cheat for it at the start of the game.