I played as a Scoundrel-Aerothurge for my Avatar. I called that variant the "Position Master" Rogue - using Netherswap, Teleport, Uncanny Evasion, Favorable Wind (early game).
There are also a few other Aero skills situationaly useful for a Rogue:
Smoke Cover could sometimes be helpful, Erratic Wisp I never really used but is theoretically helpful, Pressure Spike and Vaporize could be used sometimes to deal with certain surfaces or clouds (usually out of combat, though).
