Why not reduce the scale of souls needed to purchase and the amount of souls collected by various followers? Then add in an arbitrary cap of how many followers you can acquire through purchasing at your current CR level (let's say, no more than twice the amount that you start with? So you could acquire a second CR26 follower but that's it).<br/><br/>This both keeps it from looking like we're sucking entire planets dry, and gives more reasonable numbers to work with.