I've gotten pretty much a Macedonian ironclad defense for my walled cities that border my rivals. Its a two teir defense.

1st Defense Tier (Walls themselves)
Stationed Units: 4 Heavy Infantry/Hellenic Spearmen, 4 Archer units
2nd Defense Teir: (2-4 Main Street pathways)
4 Phalanx units

Basically even if they manage to take the walls ill still have the phalanxes in the streets for them to contend with. Havnt had a chance to really put it to the test yet but its basically a combo of two of proven defense stradegies.

Your army is of very good quality! No wonder those Ptolemaioi were destroyed so easily!
Yes lol the Macedonians are richer than the 4 major factions combined so they can afford it. My navy also has already 4 units of those huge hellenic ships. I got three royal armies now all of which have similiar compositions with minor differences in supporting light-heavy infantry to the Elite phalanx.