There is a super-easy way to find out whether the Ruby in the helmet works multiplicatively in GRs. Run a GR with it and then another without. Keep track of how much XP you get from each approach. I just did this, and the Ruby in a regular helmet gave me 41% more total XP.
0
There is a super-easy way to find out whether the Ruby in the helmet works multiplicatively in GRs. Run a GR with it and then another without. Keep track of how much XP you get from each approach. I just did this, and the Ruby in a regular helmet gave me 41% more total XP.