My best strat for AV was to go up and defend galv, which would usually end up with the allies leaving to move forward and galv lives then i watch timers and go take back IBT with like 1:30 left on the timer.. if i have time i get tower point...

Then i setup camp inside one of the towers and wait for allies to try to take it.. and 5 shamen is VERY hard to dislodge from a tower usually end up with liek 3 mages aoeing me