Merc Auras

I've seen different versions of mercenaries with 2 auras. but never an Eruptor with determination and purity of fire/herald of ash. Do they even exist?

https://poedb.tw/us/Mercenaries

Says here it is possible for Eruptor to spawn up to 2 skills from this group. So yes, but I don't think it is guaranteed to get two, and when it does, I think it might be a 25% chance for Determ + one of P.fire/H.ash.

Molten Shell
Determination
Purity of Fire
Herald of Ash
Flame Link

I have completed more than 300 maps, but I have never seen them. That's why I decided to ask here, because I had doubts that this was possible.

I think there is probably just a lot of combinations.