Since archer upgrades don't work (or you have to hand dye them) Rouge upgrades would replace them, for 250 kills for rouge your would get perm s1 or perm something else, reminder 250 kills is a lot for rouge.
Rouge upgrades :250 kills = res 2
Rouge upgrades :350 kills = str 1
Rouge upgrades 450 kills = res 3
I think that would be an amazing choice for next map. Thank you, (This is for kitmap)