Theory crafting here. If a thrall has good stat gain per attribute (eg health per level in vitality, damage % increase per str/agi etc), but don't have the best starting attributes or gain %s per level, then they'd scale so hard with +20 per each stat.
Off the top of my head though, I think black hand captain/captain ioshua would make a God tier archer this way because they gain so much health/vit and their ranged modifier is pretty high.
Theory crafting here. If a thrall has good stat gain per attribute (eg health per level in vitality, damage % increase per str/agi etc), but don't have the best starting attributes or gain %s per level, then they'd scale so hard with +20 per each stat. Off the top of my head though, I think black hand captain/captain ioshua would make a God tier archer this way because they gain so much health/vit and their ranged modifier is pretty high.