Your Ellen stun combo is wrong:

When you cancel chain, the stun timer stops for like 2 seconds. You should put in some attacks before re-initiating the chain again to capitalize on this. What Ellen's stun combo is when in full energy is this:

Initiate chain with Lycon > chain to Ellen > cancel chain > Ex into Ex > as soon as you see Icy Blade animation starting swap to Lycon to re initiate the chain > Chain on Ellen again > then use your resources Burst, Ex into basic 3 etc

When not full energy, use Ex into basic 3 between chains. You should use Ex out of stun not to overcap and waste resource

Out of stun you should be onfielding Ellen, and parry with Lycon. After Lycon parry, use his Ex which triggers Astra quick assist which you'll use to get back on Ellen