Perfect Balance: TwS or DK?

[MrDiezel]

Hello, was having a discussion regarding Perfect Balance. Ill use PB on a Boss fight, and am *guaranteed* 4 hits. With this, I go Twin Snakes - Snap Punch - Snap Punch -Demolish.
My friend, also a monk, told me he goes Dragon Kick- SP - SP - Demolish

You can also get 5 hits during a PB buff depending on latency, Skill Speed and how fast you get your GL stacks. 5 Hits will omit this question, BUT..

What do you all prefer to use between the two?

Twin Snakes adds a 10% damage buff with a max potency of 140 from Flank.
Dragon kick decreases Blunt Resistance by 10% on target, does a potency from 150 from Flank.

Assuming we are running a Light Party (with no other monks), is it more beneficial to have +10% damage or -10% Blunt Resistance? I would assume Blunt Res. but heavily depends on how much the enemy has. I tried to test on Dummies in Summerford Farm, but im sure they have little to no blunt resistance; I got slightly better results from damage buff. Any insight would be helpful!