As it is the DoTs in this game fall under the snap shot rule. Meaning that they will use your stats at the time of application and will not change. Further more the DoTs in this game also use a global tick that is based on the servers clock so all DoTs will tick every three seconds and the exact same time as every other DoT on the server and are actually shown as one combined DoT.

Example: As a BRD you apply Venomous Bite and then wait five seconds and apply Windbite. Both DoTs will tick at the same time and instead of showing as 25 and 20 will show as 45.

Now taking it one step further with the global tick based on the server this also means that by when you actually apply the DoT you may see a tick within the first fifth of a second or you may end up waiting the full three seconds before seeing the first tick.