Vigor vs Peparation

[playingtokrush]

Posting here to correct myself: I had previously played the game of Mathcraft, stating why Vigor might not be helpful most of the time.  I was wrong.

At level 60 I still was indecisive about what talent to get.  My final thought was "well, going 30 points into a tree without going 31 seems like a waste ... let's try it out."  I haven't respeced at all, so a bad choice wouldn't cost me much.

Previously I said that Vigor would probably only help when things go wrong - a miss means the extra 10 energy could be used for something.  But battles have gotten longer since then (the important battles, anyway), and my Mathcraft skills forgot one talent: Relentless Strikes.  Relentless Strikes has been very useful, it gives a 20% chance per combo point of restoring 25 energy after a finisher.  5 points = 25 energy :)

The true mathcraft, then, has been working like this for me:
I start with 110 Energy.  Open with an Ambush, that gives me 50.  At this point I'm mostly using Sinister Strike, so I'm rotating between 10, 30, 50.  When I get 5 combo points, I hit Eviscerate at 50 energy.  That leaves 15 energy + 25 for Relentless Strikes = 40.  At 40, you're already ready for another SS :)

The way I see it, the longer the battle, the less worthwhile Vigor is.