I had a quick look and came up with these. Taking requests for anything else (since I haven't really played it, don't know what to change)

Invincibility
5e d2 07 27 -> 5e d2 07 26

Fast Mana Regen
5e e0 0e 24 0a -> 5e e0 0e 24 7f

Instant Mana Regen
60 e0 0e a0 68 a3 01 -> 60 e0 0e a2 68 a3 01

The invincibility makes it so you always have the hat on (although it will fall of each time you get hit, kinda funny). Instant mana regen makes your mana instantly refill but makes the bar go right across the screen which I found to be annoying.