Hercules indestructible, Luke cage indestructible (though difficult to time). I'm not sure if they work, just guessing
He said indestructible, the one obtained from throwing sp3, not immortality
I've only fought Galan when he was the EQ boss. Never really bothered to read his abilities cause he was an easy one shot with Tigra. Never took harvest damage with her, I imagine cause he couldn't get his buffs, so I would think anybody who stops him from getting buffs would be effective.
Is it energy damage? If it is, diablo's distilled will prefight will Regen 70% of the damage.Can't find a stacked galan to test it against, as you can't use prefights in duels.