3 Strange vs 5 Strange at 550

Polares

I was checking today how 5 Strange is compared to 3 Strange when both are 550 and I found out some interesting results.

5 Strange Hitpoints 77k
3 Strange Hitpoints 90k

5 Strange blue at 550 => 13.7 dmg
3 Strange blue at 550 => 15.1 dmg

5 Strange yellow at 550 => 12.5k dmg
3 Strange yellow at 550 => 14.7k dmg + 3k heal

This is a bit... weird?

3 Strange is better than 5 Strange, 5 Strange has an active in yellow but loses the heal, blue is just worse and I guess purple is better for 5 Strange. I was expecting closer numbers, even 5 Strange being a bit better, but not a 3 scaling better than a 5. That is unexpected (we know 4s scale better than 5s, but I thought 3s would not).