So, basically, the Table 4-1 penalty progression. Eh, it works. The attack penalty won't be that bad due to Touch ACs, HP loss might sting since Con is third in line for stats, and the Save penalty is always relevant.
Anyway, debating on the final mix of things. Currently looking at Wlk9/HFW1/LC10. This ends up with 24d6 blasts and 18th level Invoking, with the maximum amount of free stuff. Shame about needing 12 ranks in a skill to enter HFW, I was hoping to get it as ECL8.