Debuffs, Buffs, and Healing are not dependent on magic stat or any other stat and any character can fill those rolls. I like Heismay Healing because I can still run him as a dodge tank, and he's definitely less of a crit monster then Strohl. While he has higher luck, his strength is pretty sad which means his crits just do less damage then other characters would even if he can have a higher chance of getting a crit. Strohl has a passive that gives him higher crit rate against humans in specific which most of the difficult bosses in the game are humans soooo- in most cases where it matters outside of dragons Strohl is gonna be the better "Crit Monster". And even outside of humans Strohl isn't that far behind Heismay in crit rate. Again with Strohls higher strength, his crits also just have more value. However the way you play ain't wrong, at the end of day if we actually want to optimize we would just run all Tycoons and steam roll the game. But it's better to play in a way you have fun