Max payout is 130,000+ for 25 - 35 minutes of your time with decent randoms. It's challenging enough you'll need a team of dedicated farmers who when to stay put and know how to lag Banshees on counters. It's one thing to hear about it, but a whole other to see it in action. If they hadn't done it we probably wouldn't have cleared as most of the time/cobras spent dealing with them would have likely contributed to another wipe. They are by far the most threatening unit besides Phantoms, Hunters and Geth Turrets. Centurions, Atlas Mechs, Brutes and Pyros are a godsend. Enjoy the peace of mind those waves bring. Again, Banshees, Phantoms, Primes, Geth Turrets and Hunters are the most threatening units on the field. Prioritize them above all else.
The backyard behind the usual spawn point is more active than in Gold so you have to be aware of it if no one is camping outside. Equipment is still optional, but without it even my Harrier II wasn't pumping out enough damage. Third attempt (which is the one we cleared) I Lvl. 3 and 4'd that bitch out. I would advise only equipping gear in public games until your team proves themselves because there are too many Bronze/Silver players and Missile Glitchers clogging up the lobbies right now. Make sure you LEAVE lobbies with the latter afterward as playing with them for more than one game is a bannable offense.
Objectives are mostly hell regardless of who you bring with randoms. I don't recall us having a Infiltrator, but even if we did I doubt much would have changed as playing the role of a decoy is much more tasking due to the increased dps, shield regen and variety of the enemy. More often than not you'll need to buddy up with them for a change. If you're sitting on a fat stack of shield recharge consumables then this is the difficulty to burn them. Stick your head out for too long and you WILL be getting downed. Period. Point blank... don't venture into Plat if you're stingy with consumables and don't plan to revive decent players. You aren't welcome.
Also, hoard Cobra and Medi-gel if possible until Wave 6 at least, but don't be surprised if you reach Wave 10 and have to make a sacrifice chain reviving yourself around a hoard of Banshee, Prime or Phantoms to ensure the objective runner gets the job done. I had to do it then distract a Prime with Arc Grenade spam that was dry humping the objective runner. I stunned him long enough to get the cash. I was an N7 Demo with zero fitness and everything else maxed out for tech and fire explosions. Topped out with over 150k. She makes farming stupid easy.
There's a farming method to bang out Plats in 20 minutes with zero equipment, but since it requires actual teamwork and the DLC just came out it's going to be a long while before the community wises up. Overall on a good team Platinum is just Gold+. On a horrible team Platinum is off limits or gear only sessions.