Using touch of death after your opener makes it outscale the other after 4 ticks
Touch of death is a 25 potency elementless DoT that lasts for 30 seconds giving it between 9-10 ticks. DoT Damage is not modified by Dragon kick.
Note that damage buffs are multiplicative.
Applying ToD before having your buffs(assuming just fists of fire) up would give it a potency of 21 and a DoT potency of 26.25.
Applying ToD after the opener will give it a potency of 35.49 and a DoT potency of 40.33
Applying Touch of death at the start will give about 3 ticks meaning you will get a total of 21+26.25*3 = 99.75 potency before the other ToD
Before opener = 99.75>126>152.25>178.5>204.75>231>257.25
After opener = 35.49>75.82>116.15>156.48>196.81>237.14>277.47