I will admit to personally being a recovery overkill player. Get Ageless with a lot, otherwise use other tools more heavily than average. Like my Stamina is usually slotted 2 Performance Shifters and 2 Power Transfers. Or I use HO’s to get better end redux on some toggles.
I simply hate the thought of having to slow down to conserve end, ever. Nothing murders your DPS like bottomed out end. So yeah, I err in the other direction a bit.
You talk about it being ok to eventually run out, but I never sit and wait after a fight, and also AV soloing fights can get pretty long. If you solo pylons, you having a toon that is good on endurance for 60 seconds instead of forever is going to be reflect poorly on your DPS.