1) I have 25% LRC on my sampire to cast Vampiric Embrace after dirtnaps. In the last hour and a half I died 5 times. After every single death I needed something like 20/30 attempts, between fizzles (I'd say 10% of all attempts) and "More reagents are needed etc". I don't even want to calculate the odds of this - especially since it is like this EVERY TIME: before I used to only have 13% LRC, and I NEVER, I repeat NEVER managed to cast the spell when needed. 2) The aforementioned dirtnaps were due to a descent in the Prism of Light, where I spent 30 minutes killing daemons, hydras and serpents to get the first three keys. And the following hour killing crystal vortexes, without ever seeing other than crystalline fragments. I don't even know how many I killed before freaking out and calling it a day. 3) When Imbuing, I find there's a very simple translation: if the chance is above 70%, it's 95%. If it's below 30%, it's 5%. I guess the displayed chance is actually a percentile on Gauss bell, then. Fun, eh?