Ways to bump Spellcraft?

[Diirk]

Looking for ways to bump up my spellcraft score assuming around 10th level wizard, core rules only

16 starting int (point buy system), 2 stat raises, +4 item so +6 int mod

13 ranks +6(int) +2(synergy, knowledge:arcana) +3(skill focus) +2(magical aptitude) +2(morale - heroism spell) +10 (competence - item)

= 38.. anything I missed?

 

[Iku Rex]

= 38.. anything I missed?

Stone of Good Luck (+1). It's a bit pricey (20000) for a 10th level character though.

I've been trying to max out spellcraft myself for the Incantatrix PrC (FRCS), and it's hard to do. There's the spellwise regional feat (PGtF), but no published item that I can find adds to spellcraft. (I take it the +10 item you've listed is custom made?)