i came across this topic long time ago and i think about levelling double-blitz like this, but with following devotions:
Don’t mind the fantasy double-green belt, it’s nice addition but not a must and it’s a carry-over from the original build. Though i really think it may be a good idea to shuffle the points from Overguard to Menhir’s Will, as it at 16/16 it is 70% of health restored every 15 sec (when health drops below 33%).
What i ask is do you really need Obelisk of Menhir in your build? Block chance and block recovery is not that high to proc it reliably?