Horizon walker sneak attacker

[Nosta]

I am seeing a wandering swordsmen/Assassin
For my character. I'm thinking Some like Slayer(6)-HW(2) I'll be starting at level 8 or Unchained Rogue(6)-HW(2) My main goal is to Blitz around the battle field with the Dimensional feat line and activate sneak attack and slice my foes up.

The Game will Mostly get to level 16
so so far my two Builds are looking like
Unchained Rouge (Knife master/scout ) (6) / HW-(3)/ UR(KM/S)(7)

Or

Slayer(not sure if there is an archetype i should take) (6) / HW(3) Slayer (7)

or if there is a better build i have not come across.

I know i can abuse rogue talents for terrain mastery but since i play with low power players just being able to pull off the combo a few times a day would be fun for me

[Psyren]

My main goal is to Blitz around the battle field with the Dimensional feat line and activate sneak attack and slice my foes up.

I would just do Unchained Monk (http://www.d20pfsrd.com/classes/unchained-classes/monk-unchained/) of the Mantis (http://www.d20pfsrd.com/classes/core-classes/monk/archetypes/paizo-monk-archetypes/monk-of-the-mantis-monk-archetype/) 20 personally.

Whichever one you go with, don't forget Accomplished Sneak Attacker (http://www.d20pfsrd.com/feats/general-feats/accomplished-sneak-attacker/).