BBEG builds

[zyggythorn]

So I'd like help building a Big Bad for a campaign, because I expect the party to meet him in the next 3-4 sessions.

To clarify, if they try to fight him, he will oblige viciously and quickly. I don't expect this to happen because they've seen his handiwork previously. (Lobotomizing aboleths, breeding Illithid tadpoles, turning people into lycanthropes in a Captain America style experiments gone horrifically right, relatively benign creation of magical beasts, not-so-benign creation of magical beasts, live autopsies)

With that being said, I've got an idea of what I want and need, but not the op-fu to do it.

Here's about what I've got;

NE Human Artificer/Fleshwarper/Mindbender at a combined lv of 25

Int 37 (reincarnation abuse)
Wis 12 (gone crazy.)
Character 22 (well practices in lying)

Physical stats are mostly irrelevant from use of alter self and similar spells/infusions.

Yes, I'm aware that Mindbender is not technically compatible with Artificer, but a small step of logic allows it to work either way. Any advancement of CL counts as advancing Infusions for this case.

Any suggestions to make it work?

Epic casting is preferably avoided, or kept as a ritual.