I need help with contact other plane.

[Tr011]

Insight of Good Fortune is a PHB2 spell that allows you to roll the check twice. It's a level 2 wizard spell with 20gp material components. Coupled with Mechanus Mind, (Greater) Heroism and your +7 int mod with an Alter Fortune back-up, there should be no need to worry.

[kitep]

Greater Heroism gives you a +4 to skill checks, but not ability checks.  Someone said they're not the same so greater heroism won't work   

But I looked at some of the spells I found by searching Captnq's spell book, and it looks like he won't have any trouble getting a sure thing.

[Craiconn]

One of the problems with using spells to help boost your INT checks is the casting time of the Contact Other Planes spell itself.  It takes 10 minutes to cast this spell.  Very few "INT check support" spells can help you boost the INT check in that long time window.