Enchanter 5 remaining points - INT or STA?

[Tecmos Deception]

The whole "you cap int and cha easily with buffs" thing isn't terribly accurate. It's basically advice for at 60 and if you are getting raid (or at least lots of nice solo/group/droppable) gear.

Especially without serious twinking and MOST ESPECIALLY while leveling up, you won't likely have both above 200 let alone at 255... especially if you want to wear any hp or resist gear, keep a goblin ring equipped instead of swapping out, and so on. You need stuff like epic, planar/thurg armor, nice droppable items, and self buffs at 55+ to cap out both. And even if you do own gear that can cap both, you probably will want to swap out int or cha or both for more hp and mr.

I'd be surprised for a chanter to be at the point where int and cha are both 255 with buffs and you've also got some semblance of hp, mp, resists short of having multiple TOV pieces.