So I tried QMR's QFI melee build with a slight change (5/6/6/6/3 ... EDIT: yes, stupid me forgot about the top 3 ranks in fitness. Time to respec) on Gold. I couldn't think of what shotgun to put on her, so I started out with Disciple with melee mod.
1st match, a GIP against Collectors on Rio. It was brutal and my screen was red for most of the game. Even so, I got a little better as the match wore on. Not in meleeing anything but shooting stuffs with the Disci. Managed to finish 3rd.
2nd and 3rd matches, against Geth on Glacier. Bitchslapping Geth is a lot of fun, Sabotage makes morons of all of them (although, the Prime still doesn't kill anything other than his turret) and Sticky Grenades are devastating in such close quarters.
Had a couple of games against Cerberus and one more against Geth. I tried a lot of weapon sombinations, Reegar with Arc Pistol, Reegard with GPSMG, Piranha with GPSMG. I'd prefer a pistol or AR to the shotgun but I didn't want to lose that extra 25% melee damage that the shotgun mode gives you versus the melee mods on those two.
Thoughts,
1. Do enemy weapons actually overheat? I did not notice any of them stop firing. Especially obvious in the case of Dragoons.
2. The duration of Sabotage is supposed to be 10 seconds but a hacked turret doesn't seem to fire more than one burst. Compared to how it keeps firing against us in unhacked mode.
3. A Quarian bitchslap still only takes off 2-3 armor bars of a Prime (I did enjoy executing a few Geth Primes though). You need a good weapon with it.
4. Heavy Meleeing Phantoms is a bad idea.
5. A HM triggers the Preatorian's bubble.
6. Shadow is arguably a better melee character even without Shadow Strike?
Low:
Devices on wave 6 against Cerberus ... Glacier ... 
No, devices against Cerberus in general ...
![=]](https://lvlt.forum.bioware.com/public/style_emoticons/default/sideways.png)
Also, I hate getting targets on Wave 3 and all 4 of them happen to be the highest boss units of the faction. **** that.