I posted my parts in build me a combo but noone answered so i decided to build combo on my own.
Rock Sagittario I AD145DS
I cant test it, because i don't have stadium right now so can anyone say if it is good against gravity destroyer AD145WD and Diablo Nemesis H145WD

It is very bad. This is why it should not have gotten out of the "Build me a combo!" topic. Simply be patient, someone will answer you as soon as possible there.