There's absolutely no reason there shouldn't be checkpoints you can leave and come back to on the 35 prison of elders with skolas. Even crota and atheon on hard weren't that brutal. After 5 hours I still didn't beat him... Now I have to start over? That sucks Bungie. Change it.
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agreed, 34 and 35 PoE need checkpoints, its rediculous, I gave up on skolas after about 3 hours of failing over and over