[quote=@Goldmarble]
The idea for his powerset, was actually a very slow acting reactive adaptation mechanism; essentially, it has taken years of getting the shit kicked out of him, to grow the dermal armour he has. And by slow acting, I mean slowly, like needing to be electrocuted six or seven times in a week, just to kick in for the body to start trying to generate methods to resist it, stop it, or do something to prevent the harm from occuring. Even then, it would take months of being electrocuted, daily, before it came up with some means of truly protecting him from it. But it isn't just his skin, it is everything: his bones are stronger and denser, his muscles have greater resistance to damage (cutting, crushing, etc). The regeneration has always been a slow-acting thing, definitively not "Wolverine" class in healing a bullet wound in a couple minutes to a couple seconds, depending on who wrote it. More like, taking over an hour.

Essentially, his entire powerset is devoted to being resiliant, tough, and extremely survivable. He is strong, but only to peak human capability (Dead lift ~1000 lbs, etc). He isn't fast, but he can run for a long time, so long as it isn't hot out...as his protection, has eliminated his ability to sweat. He can sustain a higher core temp than a normal human, but that doesn't mean much, as his overall endurance in any sort of moderate climate is still at, or less than average, due to his inability to simply get rid of the heat. Inversely, he can tolerate extremely hot environments for very short durations; his skin that insulates him from getting rid of heat, also insulates him from heat for a couple minutes at best. So he can run into a burning building, stay there for maybe three minutes and get out, but that heat will still transfer through and he will burn...just after the fact.
[/quote]

I'm not a GM so no need to take my words to heart, but I think he's alright compared to the others who have this power. The limitations on stamina will make him fairly interesting to play, since he can't just run in and save the day. The idea of being really heavy sounds pretty neat too, since he's going to be falling a bit harder as well as drowning. The resilience is built-up over the decades so it at least carries a sense of biology with it, and means he won't be getting much stronger throughout the RP. Plus living so long with a presumably harsh backstory would make someone cynical and jaded, so it ties itself up nicely.
Still, I think you could remove the adaptations from his character completely if you wanted, though seeing how old he is and slow it acts... eh. It still works. If I were you I would work on defining what he can and cannot do, maybe an extra weakness (how often will he be near water, really?), and a backstory which accounts for the slow adaptation creating his thick skin. I think that'll get him through c: Best to discuss it with the Boss, tho :D