Hello!
This https://forum-en.gw2archive.eu/forum/professions/thief/Video-D-D-20606-is-better-than-26600/first post has some valid points for taking 2/0/6/0/6 over 2/6/6/0/0, but I prefer 2/6/6/0/0 personally because that extra crit chance and ferocity + executioner is too hard for me to give up.
I also tried 2/6/0/0/6 and it was really hard to play, but also really rewarding getting a kill. You rely on withdraw and mug to sustain and try to finish off opponents as quick as possible.
Personaly, i use 2/6/6/0/0 on my D/D. I just enjoy my guaranteed crits, and the fabulous sustain that comes with the stealth.
I also tried 2/0/6/0/6. In my opinion, it takes longer to kill your ennemies, but you don’t depend on backstab that much which is also nice. Steal on 15sec CD is great, but the damage output is really not guaranteed. 20% crit chance which gives me maybe 60% crit chance in combat is not enough for me.
SOMETIMES, i use 0/6/6/2/0 for more stealthy roamings, but like I said. Sometimes.
Thief – Raiden Hayabusa
Thief – Gouki Kurokawa