I did this in a team of 3 quite easily after figuring out the order of mystery in wave 3 and 4.

Requirements:

1. Try to make use of kimimaro and kabuto in all 3 teams, except water main c*e mabui, gnw tenten and mei.

Kabuto can help sustain and remove tag while kimimaro tanks, mystery every 2 rounds and absorb attacks from minato in wave 4.

2. Bring a water main to control minato in wave 3 will make this fight much easier. Also use interrupts mystery on your light and fire main as you will need to control enemy mysteries in wave 3. Control over damage.

3. Bringing a light main for anbu passive, fire main for ninjutsu urge and guy for leech will help alot. Guy will also provide interrupt for wave 3 hokages.

4. Position placements. Place fire and light main in position action 1 so that they can interrupt any mystery in a pinch and this is also crucial to stop Sage naruto in wave 4. Place kimimaro in action 2, You can place kabuto in action 3 behind main so that his clone can help protect main.

Strategy.

Wave 1:

Round 1: just auto attack

Round 2: Finish them up so that your kimimaros have 60 chakra for wave 2.

Wave 2 vs kakashi and mask man:

Round 1: Immediate launch kimimaro mystery on kakashi, you may want to slow down to x1 speed because if you auto attack you will lose chakra and mystery will fail to launch. Kakashi should die in round 1 easily.

Round 2: Finish up mask man with auto attacks, save mystery for wave 3.

Wave 3 vs hokages:

Round 1: Wait for minato to dodge once, you can trigger it with kimimaro mystery or fire main passive to reduce resistance. After minato dodges, use water main to combo minato and control him.

Round 2: You need 2 interrupts here for Tobirama and Hiruzen. I used fire main and guy for this, make sure to place them in proper position to do this. Water main same job as in round 1, wait for minato to dodge, then combo him to control.

Round 3, finish up them up, as long as you stopped their mystery you should be healthy for wave 4..Hiruzen will also kill 1 of you but you can't do anything about it without a danzo.

Wave 4 vs Sage naruto and Minato, both are immune to debuffs. Minato also dodges first 4 attacks, which is why Sage naruto needs to die first.

Round 1: Slow down speed to x1, because everytime minato attacks he steal your chakra. Quickly target Sage naruto and mystery focus fire him down.

round 2: Use light or fire main to interrupt Sage naruto rasengan, you c*so use water main action 1 combo to immobile stop it. Minato auto attacks will steal chakra, so launch mystery on Sage naruto immediately to finish him off.

round 3: Sage should be dead in round 2, so it should be easy from here out.

Gd luck.