I finished the story now im looking for just anything to do to make a good character from reincarnation combos etc just anything lol

and one more thing which class and when has that skill Bigbang? was part of another guide but hasn't shown up at all. Bishop reincarnated into pilgrim then reincarnated genius Trickster but not once have i seen Bigbang come up after learning everything from those 2 magic classes.

It's not a class, it is a weapon skill. Specifically a fist skill, and you need a character that can learn it, in order to get it....A higher tier fist fighter should be able to learn it. And if you want to get it to another character, you need to use the class world.

Ummm, if you find a good class you'd want to keep it? You're not really making a lot of sense....Just keep leveling your characters, and transmigrate them to higher tiers when you're ready?

To get to higher levels, you need the item world, and namely the Cave of Ordeals (Ummm, I think stage 4 or 5 is the one that's good for leveling?) though.