If you see a HL Dps using Hand Clap in PvP, it is likely because they are use a strong safe damage combo that starts from it that makes HL arguably the best Dps power in competitive scrims at the moment. For speccing, I wouldn't go directly for Vit. It is currently impossible to hit the stat caps for both Might and Precision, so you should be going for Precision, then Might when at all possible. If when speccing into skill points you have to get stats other than those to get to the bottom tier innates, you can get Vitalization, Power, or Health. Toughness has had its effectiveness nerfed in GU 47, which is why it is not as recommended as the aforementioned 3. their effects will be slight, but if you want to have a bit more power, go for Vitalization and/or Power and if you want a bit more survivability go for Health. Be careful with Light Blast as an execute. It can be used effectively like most others currently, but if you play larger group sizes where the enemy team is grouped together with pets Light Blast's damage can be split by the opposing group to the point that it might not actually kill an enemy under 35% Health.