I did it, hehe. Just finished RoS on hardcore expert difficulty. It wouldn’t have been possible without the Templar because his Guardian ability saved me 3 or 4 times during the whole game.
I have no idea if Nerves of Steel ever triggered. Maybe it did but I haven’t seen any indication or icon.
Finished at level 70 plus 30 Paragon. From Act 4 to the end of RoS I played entirely with Hammer of the Ancients ability because early in Act IV I got a powerful drop - Gavel of Judgement. My DPS suddenly skyrocketed with it, plus unlimited Fury, and the build became extremely fast with devastating crits one-shot entirely everything, 2 shot elites, over 50% critical chance and using Rolling Thunder rune for AoE effect and speed.
This build is probably very inefficient for Torment difficulties but for the campaign mode it is likely the fastest imo. Much faster than Whirlwind barb in campaign mode; if you get the Gavel of Judgement drop.
Interesting ending of RoS. Hints that the nephalem might have absorbed Diablo’s soul.
Looking forward to Diablo 4