Now I'm not going to assume Twin Snakes or Dragon Kick are factored in and just assume that they effect all attacks equally in this example.
You're in Couerl Form and you pop Tornado Kick with no buffs. (Rounded Nearest)
Doing this I realized one of my previous calcuations on demolish were completely incorrect. My apologies.
1. GL3 TK (500 X 1.27%) = 635 Potency. Compared to GL3 Snap Punch (180 * 1.27) 228 Potency. 407 Potency Gain.
2. Snap Punch 180 Potency. Compared to GL3 Bootshine (150*1.5*1.27) 289 Potency 109 Potency Lost.
3. GL1 Boosthine (150 * 1.5 * 1.09) = 246 Potency. Compared to GL3 Truestrike (190 * 1.27) 241 Potency. 5 Potency Gain
4. GL1 True Strike (190 * 1.09) = 207 Potency. Compared to GL3 Snap Punch (180 * 1.27) 229 Potency. 22 Potency Lost
5. GL1 Snap Punch (180 * 1.09) = 196 Potency. Compared to GL3 Dragon Kick (150 * 1.27) 191 Potency 5 Potency Gain
6. GL2 Dragon Kick (150 * 1.18) = 177 Potency. Compared to GL3 Twin Snakes (140 * 1.27) 178 Potency 1 Potency Lost
7. GL2 Twin Snakes (140 * 1.18) = 165 Potency. Compared to GL3 Demolish (310 * 1.27) 394 Potency 229 Potency Lost
8. GL2 Demolish (310 * 1.18) = 365 Potency. Compared to GL3 Bootshine (150*1.5*1.27) 289 Potency. 76 Potency Gain
This comes out to 135 Potency gain. Now were in the green. Unfortunately, we forgot to account for AAs (Which make up about 1/3rd of our dmg).
Say we do 7 Auto Attacks during this time, 1 after each attack starting at Tornado Kick and not counting after step 8.
7 * 127 = 889 From 7 attacks with GL3
100 + 109*3 + 118 *3 = 781 From 7 Attacks, 1 w/o GL, 3 w/ GL1, 3 w/ GL2
135+781-889 = 27 Potency Gain at the end of the entire rotation, this does not factor in attack speed buffs from GL, or any lose of Dragon Kick or Twin Snakes on either rotation or not including B4B or IR or XPot or Vulnerability Buff or Astro's Dmg Buff.
At the end of the day there probably is a way to make it work into an optimal rotation but in these circumstances I think its a DPS lost until I factor in B4B/IR dropping right after its use or something along the lines of that. Also, Im not sure how AAs work under GL, I only know they get 127% Dmg modifier, I don't know if they get the 115% Attack speed Modifier.
Thinking about it. I don't see popping an unbuffed Tornado Kick as a dps increase at anytime execpt when the boss is leaving us. Otherwise Monks rotation would be Get GL3 > Pop Tornado > Get GL3 > Pop Tornado.