Take Sicily early, don't expand further in the east (even to a rebel Rhegion) or you'll run into the Romans and Epeirotes.

Add mines to Karali, take the African coast west of you to add to your mining income, upgrade the mines at Mastia in particular. Fortify your Iberian holdings, they aren't under serious threat but you never know when those stone walls will come in handy. Build troop production facilities in Sicily (I'm experimenting with government types ATM) as they will be vital to any real defence.

Now: soldiers

Dorkim Lubim-Ponnim *word forgotten* Liby-Phoenician infantry are classy. Use them and the Libyan spearmen to overrun the rebel settlements of Numidia and Massilia, particularly against the Africans.

The Libyan Spearmen are useful but do not really stand up to Romans in my experience. Try to seek an advantage if you mean to fight infantry with them.

Akontistai and Peltastai mercs can be very helpful in filling a weakness in the armies you have in Sicily once/if you lose your Iberians there.

Your cavalry are good, but I've never really found a need for them (beyond the general).