Only the Ptolemaioi would attack your islands, if they needed. But we're not so far yet, I think.

Actually, I was also thinking about the Bosporan region for expansion, colony-style or something. You might have some fun fighting the Sarmatians should they dare attack you. Sounds like a good relief from fighting Hellenic-style troops all the time. Kyrene sounds like too much Ptolies-backyard, and Syrakousai should be the Roman/Carthaginian playground for now.