On what level use whitch map types ?

I mean that somethink drop or thats no mater

Maybe this is what you need?

then when i use tier III map max level item drop 25 ?

Yes, that is correct.

EPs may be able to drop lvl 30 but im not 100% sure on this like normal cata, But yes lvl 25 items 99% of the time from a Tier III Map if your char is around that lvl also

k i mean that tHX