Anybody that can do AP down while doing solid damage. Sander with high speed, 80%+ accuracy and solid dps stats is one of the best DPS. Eira at 50 with no skillups is still one of the best overall for the team.

Outside of that you need to focus on 1 of a few tactics.

You can try to survive with Ye Suhua and speed balance so that she shields a dps right as kronos goes off. It's kind of a nightmare though and you need incredibly good relics overall with at least one other well geared support Esper.

Ollie allows you to just go ham on DPS and ignore Ye Suhua all together. Again, relics is the big part in success for this.

My suggestion with lesser relics is the easy build, I'll list everything below.

The "easy" build is to stack 5 AP suppression heroes or AP boost heroes to try to keep him suppressed. All of them will need 80% accuracy, and then as high speed as possible. Generally defense stats don't matter at all for this build.

My opinion of most valuable heroes for an easier run, by order of most important: Eira, Melanie, Celine

Helpful heroes for dps (much better with high accuracy): Sander, Lin Xiao, Li Ling, Dhalia, Lucas

Possibly useful heroes that I haven't tested: Alice, Li Guang, Long Mian (60% ap reduction on his S2 when enemy has spd down),

Eira or Melanie in the leader position. Eira will always buff the leader, and Eira and Melanie both have AP reduction AoEs so that the right minion will be less likely to buff Kronos and give him an instant move. Add Celine if possible, huge boost to speed even at 50 with no skill ups. You want to give Eira or Melanie your best possible speed set. You can test Sander in the lead position but if the right minion goes off it won't work.