Try to push her HP more than that tank, a bit less damage from her is better than dying.

Also you could try Valk as the tank with her shield she should be able to keep everyone alive

Try 

Lyssandra, Bad el, CH, Stag Knight, Valk or UGalek for Hp burn (he doesnt need to be 60 to do the job) 

Also do it manual just to pass that stage.

I know I have the champs to do it but I don’t know which team to use  plus half the time the spiders attack my cold heart instead of my affinity tank

Lysandra lead, Stag Knight, Bad El, Septimus, Cold Heart

Need help with spider 19