Malakim are my favourite civ as well. Cre/Fin rocks, with the adaptive trait to be more versatile. As for their world spell, its not weak (its okays), as when you are churning out a domination victory, you can pop out alot of your experienced priests.
As for their hero, i agree that it is waaaay in the wrong area (and late too) for a religious orientated civ. I also agree that lightbringers should be cheaper. Its very cool that you can build them and instantly upgrade them into disciples, which then for the big price of 5gp, they have sentry (woohoo!).
I feel this way also. I find lightbringers are hard to justify, but adaptive is very powerful. However, I also find that the world spell can be deadly if used to go for the war to win the game.
Best wishes,
Breunor