What do you want out of the character? I could give you ideas but that would be my character

Is it a wilderness or city campaign? Would you be the only evil member of the party? Plus it looks like you already have a build you want to do...
IIRC Scout/Rogue is a little redundant though because the "Skirmisher" and Sneak Attack's don't stack. Basically all you get out of the Scout class is:
1: d8 HD
2: +1 Competence to AC if you move more than 10 in the round
3: +1 to Fort saves (increases with levels)
4: and "Nature" abilities
a)Trackless Step
b) "Woodland Stride" renamed to "Flawless Stride"
c) Camoflage: hide in natural settings (8th level)
d) Hide in plain site: natural settings only (14th level)
For my money I would do something like this...
Barbarian 2/Druid 4//Rogue 5/Assassin 1
Get:
From Barbarian:
1: Net gain of +1 BAB (total +5 at 6th level)
2: Fast Movement (Bar 1), Illiteracy (offset by being literate from Rogue class), Rage (you don't have to use it)
3: Uncanny dodge (Bar 2), which when you hit Rogue 4 increases to Imp. Uncanny D.
4: 2d12 hps @ Lvl 1-2
From Druid:
1: Animal companion (if you want one), Nature Sense, Wild Empathy
2: Woodland Stride
3: Trackless Steip
4: +4 on saves vs. Fey
5: Druid spells (Lvls 0-2 right now)
6: d8HD still...
You would only really want to take a max of 8 levels in Druid as your wisdom (unless you up with with levels) would stop your ability to cast druid spells beyond this level. If you do that you get Wild Shape 3/day and Large wildshape too, which can be useful with studying opponents for the Assasin's Death Attack...
Let me know what you think!
