Which 6 stars should I focus my resources on?

Hrideyy

Hey Fellow Summoners,
Just wanted some advice as to which of the following six stars should I focus on, I have limited number of six stars as of now so just wanted an idea should I spend too much resources on these ones or wait for some better champs?

13579rebel_

Apoc knull and nebula

Wong_99

I’d do Sunspot too

Hrideyy

Wong_99 said:

I’d do Sunspot too

I really like him, he's a good champ with nice damage.