These reviews are completely based on my gameplay.
Mostly used in low leveled PvP but almost useless till lv 9.Load him up wit chaotic and strong isoes he'll do well.Not so great at high levels.
Worst of the FF(Free4)completely low damage but one of the only ways to counter iron man in the beggining. His main use comes from being a pilot,heroic battle and amusing people.
She is amazing.High damage output,amazing alt and a heroic battle.She's great when countering pesky tacticians espciaely cyclopes in low level Pvp.Load her up with healthy and strong iosoes and she'll really shine.
The other free heroes are
Well I hope this helps you decide the heroes you will use or not.