I'd recommend the exec for levelling. NW PvE content is notoriously easy and casual. You'd probably wipe every group of mobs with a single shot of first-strike assisted Blitz or even Smokebomb.
Stop making excuses. Be a man. If you know something to be broken, stop using it. Otherwise, you've got no right to be speaking of 'balance.'
With all the 60-70 concern (and I say this hoping the blog post will in fact make the grind easier) and also considering that the 1-60 leveling process is fairly easy, go executioner with max damage. You should want to go from 1-60 as fast as possible, so you'll have more time to spend for 60-70 xD But if at some point you can't survive the mobs anymore, go Scoundrel with a full daze build. It becomes much much sloooooooowwer, and I can't emphasize that enough, but you won't die as often.
Comments
If you know something to be broken, stop using it.
Otherwise, you've got no right to be speaking of 'balance.'