[Edi]

The Lord of the Desert Sun has hard-coded great lions, like the Moloch has imps. Kithaironic lions would be too powerful by a lot, unless he had only one or two. I'm not sure if battle auto-summons can be modded (other than being removed) at this point. Boosting Great Lions is also problematic from another point of view, which is that they can be summoned with Summon Animals. True enough that you would also get useless chaff like wolves, black hawks and giant spiders, but if great lions become Kithaironic equivalents, it'll be worth it with the new lower cost for Summon Animals.

It'd be better to just remove the lons altogether, it's not as if they can actually accomplish anything, and the LotDS isn't that spectacular on its own (unlike the Moloch).

Edi