“Legion Raids can be entered by any number of characters on your roster each week. Each character can face up to three different Legion Commanders each week - meaning your characters can fight both Valtan and Vykas in the same week. However, Normal and Hard difficulties for the same Legion Raid share a weekly lockout, so you can only attempt one difficulty (per commander) per week.”
Does this mean that if we do Valtan HM on main it will not be possible to do NM on alts?
Exactly the same as abyss dungeons. You can complete Valtan HM/ NM 6 times across your characters, however, you can only do 3 legion raids per character for gold rewards. We only have one at the moment, so nothing to worry about on that part
But say, can you do gate 1 normal and then gate 2 hard? or the other way around?
Gate 1 Hard and Gate 2 Normal in the same week? (on the same character)
yeah, you can do either gate at either difficulty in any combination you want per character.
some will do normal p2 valtan because maybe they cant get a group for p2 hardmode, others might end up doing p1 normal then p2 hard because they reached 1445 mid week.