most cheats or videos say that its best to use angel knights when fighting overlord gua-haji because titans are a waste of mana, but i say different, all you really need is the forest guardians (elf titan) and dryads (lots of dryads) to defeat him .......... same with the end
i think the lord of hell has some serious issues with flame devils because every time i send out an flame devil, the lord of hell attacks so powerfully that it takes away 500 hp!!!
the last level is well hard but all you have to do is to get 1 or 2 titans past the golden angel and destroy the castle (this will automatically kill all the enemies on the opponents battlefield)