Varian - Default

Level 7

Victory Rush if you can be around minion waves enough to keep resetting CDs

Second Wind if you are going to be slap trading with the opposing front line

Lionheart if neither of the other options are valid

Level 10

Shield Wall if you need to prevent getting bursted out, otherwise heavily prefer Warbringer for in fight mobility

Level 13

Mortal Strike if there's relevant burst heals to deny on the kill target, or the main kill target has heavy self healing

Shattering Throw if there's shields to break

Juggernaut if neither of the other ones apply

Level 16

Banner of Dalaran to buff your team's burst

Banner of Stormwind to help kite

Never pick Banner of Ironforge , as it's significantly worse with your 20