Personally i would prioritize atlantis over events(except guardians) and s3
The past hotm you already know are good heroes and will be more rare to try for than s3. Events the odds are absolutely awful and are truly a whale’s game, if i was c2p i wouldn’t spend gems on events except for guardians.
But that is just my 2 cents
Frida and Evelyn atlantis portals would be my priorities tho
Zel and kunch are nice too
So if it wont screw u out of pulls for next atlantis, try your luck. If you have to choose between this one or next, choose next.