DS Lv 5 is not worth it damage wise, besides you can always get DS via Intimidate, so I would totally ignore putting any skill points into DS and just copy it via Intimidate.
(also DS will always use max range, it is not affected by Vulture's Eye, so you can have Vult Lv 0 but still max range with DS)
You can also "skip" Vulture's Eye to get 3 maxed lv 5 divest skills (helm, shield, armour) in case you also want to WoE with your Rogue.
If you do not skip Vulture's Eye, you will be left with 5 free skill points (lv 10 Intimidate and Vulture's Eye) to put wherever you like.
(i.e. Stalk Lv 5, Envenom Lv 10)
As for a BB Bow, a high upgraded (maybe try a +7 one) Gakkung  with proper cards is the strongest currently available to Rogues, I guess 2x Andre Cards would be good for the ATK and extra BB damage.
I don't think Skel Archer Cards would affect BB damage, though I'm not sure.
Backstab is a rather difficult skill to use, you'd be better off spamming Sightless Mind for PvM.
(spam Hiding and Sightless Mind hotkey at the same time so it will never get cancelled when you get hit)
Intimidate Lv 10 (copy Double Strafe)
Vulture's Eye Lv 10
5 free skill points
Intimidate Lv 10
15 free skill points (3 maxed divest skills)
You will not be using Double Strafe to level during your early levels you will just ctrl click, you pretty much have to straight away go for Intimidate Lv 10 to be able to continue leveling past lv +75.
Gaining second class job levels gets super slow starting from job 26 on, so rushing Intimidate to get the skills to level with is a must.
Edited by Morlord, 30 November 2017 - 05:41 AM.