You specialize in springing ambushes on your enemies.

Ambush Specialist: If you are not surprised on the first round of combat in an encounter, you can treat the first round of combat as if it were the surprise round for the purposes of talents and feats that trigger only during the surprise round. Additionally, during the surprise round as a free action you can designate a target as your prime target. You gain a +2 morale bonus to attack rolls against your prime target until the end of the encounter.

Destructive Ambusher: After you designate a prime target, you deal +1 die of damage on attacks against the prime target until the end of the encounter.
Prerequisite: Ambush Specialist.

Keep It Going: If you reduce your prime target to 0 hit points, as a free action you can designate another target within your line of sight as your new prime target. This new target remains your prime target until the end of the encounter.
Prerequisite: Ambush Specialist.

Keep Them Reeling: Once per turn as a swift action, you can make an Initiative check, opposed by the Initiative check of your prime target. If your check result equals or exceeds your prime target’s check result, your target is flat-footed against all attacks you make before the end of your turn.
Prerequisite: Ambush Specialist.

Perceptive Ambusher: You gain a +5 circumstance bonus to Perception checks against your prime target until the end of the encounter.
Prerequisite: Ambush Specialist.

Spring the Trap: If you and all your allies roll higher Initiative checks to start combat than do all your opponents, you automatically gain a surprise round, even if the opponents are aware of you when combat begins.