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If you are willing to play a Paladin you could put that 4 in Wisdom. Your Will save could still end up OK due to your Charisma modifier. There are enough ways to boost Perception that you'd eventually get past that penalty. For roleplaying purposes I'd think a Paladin with a 4 Wisdom would tend to charge in where angels fear to tread. Especially at low levels he might be lost in thoughts of holy mysteries and the righteous wrath he'll visit on the undead.
If Paladin isn't your thing maybe you could dump Cha but tie a social skill or two to Int using a trait. I have a Cha 5 orc who intimidates people with his Int of 14 (pretty much a genius in orc terms). You could do something similar with Diplomacy if desired.
It might be nice to avoid 4 Int if you can since it makes your skill points painfully low and you'll likely be subjected to claims that your PC "couldn't think of that". There's another thread on this right now in fact.