What counts as high level duty?

[Slappah]

What's funny is T3 takes longer to clear than T4 anyway.

@OP - T4 unsynced spam is probably the fastest, easiest way to get a tank mount.

I haven't done t4 unsynced, I'd imagine it's pretty quick

At the same time, you can do Titan ex with 7 tanks 1 heals in 2 minutes, which is pretty fast as well