Located in Shadowmoon Valley in Draenor.

Ashlei is awesome!  You can level two pets against her as long as you have a Clockwork Gnome.  Her third pet is an Elekk Plushie, so you can do whatever once the first two are dead.

Start with the Clockwork Gnome against Pixiebell.

Build Turret is your priority.

Metal Fist while Build Turret is on cooldown.

Repair when Pixiebell dies, since Doodle just stands there.

She’ll swap in Tally, keep up the old priority.

Tally dies, Doodle comes back.  Swap in your first carry pet (Elekk Plushie the first time!), swap in your second carry pet, go back to Clockwork Gnome and finish Doodle off.

TL:DR version:  Clockwork Gnome > Build Turret > Metal Fist > Metal Fist > Build Turret > Metal Fist > Repair > Build Turret > Metal Fist > Metal Fist > Carry Pet 1 > Carry Pet 2 > Clockwork Gnome again > Build Turret > Metal Fist > Metal Fist > Build Turret > Metal Fist.  Win!