“Orcish Fury” from Xanathar’s Guide is a bit confusing when it comes to crits

Xanathar miniature!

What about replacing the net damage with a monk weapon’s damage die as a kensei weapon?

Can rangers use Ruby of the War Mage?

Is the Path of the Zealot’s Divine Fury similar to a Rogue’s Sneak Attack?

How does a Zealot Barbarian’s resurrection ritual change according to your rules on said ritual?

Are the magic item tables on Xanathar’s Guide intended for a certain number of PCs?