Guild Wars 2

Hi there i didnt get to play the BWE´s so this is totally theorycrafting from me.

Build will be used in PvE

First the Link
http://en.gw2skills.net/editor/?vRAQNAR7dnMbClbiN3AubC0bilcBLeK2FDjUbh1wzCKA0AWBA-TBTBABWqSBnqrQtSjmPCAQv/gzHEAzUCelys/0MgnOg8uAAA8AAIFgfitA-e

I tried to set it up to be at 95% crit chance on greatsword with 25 stacks of vuln for that sweet gravedigger spam, but as i dont want to do this for 5 minutes on a raidboss i tried to mix in some conditions.

So switch weapons to condition set before you go into reaper and start chilling and burning the foe, when RS wears of move back to GS and start digging again.
Rince and repeat.

My runes of choice are Exuberance to make the most out of that sweet vitality.
But i´d also like to try out

Rune of the Flame Legion (+burn duration and + dmg)
Rune of the Elementalist (power , condi, burn + chill duration)
Rune of the Wurm (vit, ferocity, vit to ferocity conversion)
Rune of the Ice (vit, chill duration, +dmg vs chilled foes)

Did someone maybe during the BWE test something similar and get some expectations how viable this will be dmg wise?

Thanks in advance for your answers and oppinions on this build.

Best regards Feanturo
(Please bare with my grammar, english isnt my native language)