Prestige is 360 (plus whatever handicap you add). (Destiny)

by Claude Errera , Monday, August 20, 2018, 14:02 (2364 days ago) @ Schedonnardus

I haven't played on PC in awhile, my guardian is only at 341 Power. I've been doing my Moments of Triumph on Xbox. I might be able to help, but I'm not 100% certain.

Probably not gonna be able to help at 341, unfortunately. :( (To ensure hitting the bonus threshold, you need a handicap of around 25 - meaning you want characters at 385 or above. You can hit it with a smaller handicap, but then you need to up the OTHER modifiers you're adding, and that makes it as hard or harder.)