I'm really like this fighter, he's well designed, indomiblable is cool, not over powered.
But a Paladin with protective aura and a charisma mod of +4 standing beside the fighter that has advantage on saves to aviod magical effects is going to make that fighter super tough. Its a potent combo, because your almost forced to kill the Paladin first if you wish to take out the fighter even if the fighter is dealing more damage. Very tough combo. +4 bonus and advantage to those saves.
But a Paladin with protective aura and a charisma mod of +4 standing beside the fighter that has advantage on saves to aviod magical effects is going to make that fighter super tough. Its a potent combo, because your almost forced to kill the Paladin first if you wish to take out the fighter even if the fighter is dealing more damage. Very tough combo. +4 bonus and advantage to those saves.