Celtic Heroes

I was wondering what the spawn are for Pyrus the lava lord and grammok the stone lord.

Ty in advance!

3hr on py and 2 on gromm

To be more specific, the avarage for pyrus is 3 but can spawn between 2:30 and 3:30 after last kill.
Grommak isbetween 2-3 after last kill and so is chained king.

So if you wanna make sure you get it you need to be there 2h after last grommak and 2:30 after last pyrus.