Those are wonky though. They work, sure, but they're wonky.
That does give me a level 4 and 2 spell though. The biggest problem: bigger forms=less dex. That would mean I'd want to do an int based archery build, if possible, or a str based, but since those are both not very possible (don't know of any way to get them) cha or wis based.
Idea! Size increases don't stack, but if I change into a larger creature, I can use a size increase. Like Expansion. So, I take a few Archivist levels, then take Psychic Warrior, and use Alter Self to take a form of one size larger than me. Then I use Expansion to grow two size categories. Now to check the alter self forms guide...