The scorch is mostly memes for when I run in to some stupid soul eater mob, I never worry about it outside weird niche scenarios like that.
I haven't tried any ubers yet so I just haven't worried about endurance for normal pinnacles when I do them. The damage and AE is so overwhelming its just never an issue. Even in big 70 quant feared runs the bosses die ~3-5 seconds so who cares about endurance charges.
If you wanted to do dedicated bossing and ubers you'd probably swap the chest to a skin of the lords with magebane and put enduring cry in to your lifetap link in place of the enhance. If you have big money I think you get a foulborn headhunter for soul eater to really juice single target for ubers.
Edit: I forgot the PoB doesn't account for the jolting graft either, so the damage is considerably higher even