Exas best role/agent is still Omen. I think you can still have Zander on the team however to play Astra then exa can play a senti but when exa is on Omen you put Zander on viper.
Chloric absolutely should be there and he also brings the ability to further flex onto senti if say Zander is on Viper and exa is on Omen.
Ion is still worth keeping but again his best agent is also Omen like exa, although ions viper is decent at least. However ion on duelist is still good and I'd keep him over jerrwin.
Seven is a very good flex I just wasn't too convinced of his Yoru and this team would need a Yoru player/ someone who can play in a double duelist comp