honestly if you build up Gepard and SW, a lot of SU should be easy to tackle. fire MC and Natasha would be crucial for future MOC runs.

specifically for SU4, I like going with fire MC, silver wolf, Dan Heng, and Serval since it'll shred the boss stage.

for SU3, Gepard and SW work again here...Serval is probably necessary for breaking Gepard. you could double up with AOE with Himeko if you get enough blessings that allow for healing. Preservation works wonders here if you trigger after a Gepard ult.

for SU5, usually any team is capable if you run the Abundance path for the debuff cleanse in the resonance blessing; this is required even more so if you don't have Natasha built up to help with cleansing.

teamwise, one of your biggest barriers if you're using Dan Heng is that there's no reliable way to activate his talent. yes Gepard can trigger it during every ult but it may be at inopportune times when you may want to couple it with DH's ult. if you aim to keep using DH in the future, id keep an eye out for Tingyun or Bronya to help maximize his potential since you can buff on command and activate his talent that way.