In my campaigns till now everything was fine with the composition of missile troops in the enemy armies. However I have played for longer times only (but repeatedly) Epiros, Makedonia and the Ptolemaioi, my favorite factions.

I think some changes with the missile troops could indeed be considered. I like the sling and am slinging myself a bit but I have problems with the outstanding performance of the sling in EB, especially the AP feature.

We have astonishing reports about sling performance from the ancient times and from the American Conquista. They may be true or not but if you look a bit closer to the ballistic formular and compare it with that from arrows and javelins one gets an unpleasant feeling. And when you look at modern examinations what energy is necessary for blunt projectiles to injure armoured personal the uncomfortableness even grows.

I think a solution could be to lower the reach of slingers drastically, if you don't want to remove the AP attribute. Although a sling can outreach a bow the energy of the stone or glandes at that distances would be very low, too low to be more than an annoyance for an armoured man.