selkie is +atk/-res and lethe is +hp/-res
both look like really good units, but the ivs arent much help
im not sure how much the -res is hurting selkie, she might take 1 more point of damage than usual and the loss of dealing damage is sorta helped by +atk
lethe looks like she could become stupid tanky with a good amount of speed, so I feel like she might also be a worthy investment too
do either of them really need better IVs? how much is selkie effected by -res? how much is lethes tanking potential impacted by her IVs? do I need to bother about getting merges at all?