The Hama and Hamaon spells suck in the older SMT games it's like throwing darts at a board.
I know, and this is usually with the boost skill attached. There's a couple of enemies in Maniac where it just doesn't make sense because they are hard to kill otherwise and you can't run from them.
The last SMT games I played were IV:A and IV so I'm used to those skills working most of the time, especially when something is weak to them.