Hi
You say the true about Grimnif,he is op champ
If u ask me i suggest next
Tier7-down
Tier9-up
Tier 7 down cuz you can make dmg to all enemies and help your team to beat fight
Tier9 up is more usefull for defense and push lane
U have 20 sec with 10% dmg
That is way how i playy Grimnir
I hope that you help my suggestion
See ya