Well, I got the mod working. The army leading is as I remembered it: glitchy and kind of hard to manage. But it's a mod so it can't be perfect.
My main issue is that they ALWAYS get stuck on blocks. Wouldn't it be simpler to have them act like wolves where you just need to right click to get them to follow you and they TP to you if they get too far away?
Also, how does one change the skins of the spider like CarFlo did? He made the body white but I dunno how to do it. That'd be cool to figure out.