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Valiant event quest Cassandra Nova

I need some tips on how to defeat her please. She seems impossible to be killed. Help me please.
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But otherwise, yes, you need to intercept her. I used Shuri, Jack and FAM as my three. Shuri was the easiest, but they were all solid for her.
Her sp2 is 4 very quick, (back to back dexes) than a 5th dex about 1 second later
1. Intercept her to push her to special 1 and bait it.
2. Dex the special 1 and punish her when she is charging.
3. Rinse and repeat
Dont push her to special 2, its much more difficult to dodge and if she does the heavy then dont intercept. Champions with DoT is your best way to get this done fast. Champions with power drain/burn in their kit is not the best idea from timing perspective because the safest way to do damage is to punish her special 1. Her AI can be irritating with constant shallow evades if you rely on intercepts only.
Best champs - Shuri (keep rinsing the crit shocks), jack o lantern (nice red numbers), Nimrod (special 2 hits hard) and Ironheart (consistent incinerate damage and vulnerability with the sp 1). I tried Iron Man, Fantman, Red Skull and Warlock too but Iron Man was too slow and the power drain on the others was affecting my timing.
Don't rush in to punish her heavy. Her SP1 is super easy to evade.
her sp1 is soooo easy..