In terms of versatility, regular Thorakitai and Theurophoroi are much better than Iphrikatous Hoplitai and Thorakitai Hoplitai. Frankly, I don't use them unless I feel like historical roleplaying, because as spear units they are sub-par (always switch to swords when you want spears) and as an armor-piercing unit they are only average. Plus, the Iphikratous are not even armor-piercing, they just have a normal shortsword, which in general are the worst weapons in EB. As for the armor-piercing Thor. Hoplitai, the low lethality (I think it's only .11) of the Kopis means that they are not nearly as effective against armored units as other AP units armed with axes (lethality .165) or rhomphaias (lethality .26). Given your geographic position, you might as well just use Thracian or Celtic mercs and regionals as AP and high-lethality units. I will admit that the Thorakitai Hoplitai do have great morale though.