As topic, I find that the rest bonus from Hot Razor Skewers cannot be stacked with Weapon Modal, Tenacious sometime, my game version is 4.1.2. Below shows the screenshot of provement.
As you can see I have rest bonus +2 PEN from Hot Razor Skewers, and I have sword modal Half Sword on, but I cannot get both pen bonus.
I also try to case Champion's Boons on my Pallgena but it fails miserably...