Training: speed increase
Stamina: cost reduction
Training: cost reduction
McCarty is tough. On the one hand his troop skills are amazing and I recommend you get him to 131, on the other hand there are better heroes to bring into battle with you.
For example his Dead Eye recharges way too slow. If you have McCarty and they have healers, you might have a bad day. I’ve found myself often regretting the choice over someone like Requiem.
His Farewell Gift sounds really cool, smack all foes on death, except that when you realize it only hits for 140% damage, compared to many other five stars he’s just not up to snuff.
His only redeeming quality is that Toxin Bullet applies damage over time in the form of poison which can really make someone’s day a lot worse.