Advice- Who should I take to 4/40 first?

niceguy22

Summoners,

I recently have had a lucky streak. I took Heimdall to Rank 5 and pulled several solid 4* champs. Of the champs listed below, who should I take to 4/40 after I take Heimdall to 5/50? Worth mentioning that I am halfway done with clearing act 4 and am working on building my AW roster.

I also pulled a 4* Magik but I already took her to 4/40