I Have my AB unlimited would mate be the next step ?what do you think?

YES!!! 500 or 1600 Mate. Remember, that license will cover 100/200 ton Master so go big or go home!

What are you sailing on / what tonnage is most of your time on.

Mostly small boats. I guess I should get days on bigger ships. 200 ton

Go to the NMC website and look at the checklists for3rd mate unlimited, 500 & 1600 ton mate. If your time is on vessels of less than 200 tons, 500/1600 mate should be your route.