DoT questions

[Viridiana]

Let's say I use Cleric Stance, cast Aero, and switch back, will the Dot apply the damage with 'full cleric power' every tick? Same goes for Raging strikes?
If I use Bio, Miasma and Bio II, and then cast Raging Strikes to start spamming Ruin, will it be 'wasted'? Should I cast it before the Dots?

Correct, if you have Raging or Cleric on when it's cast, the full duration is buffed. If you want to buff Bio, Miasma, and Bio II, you'd want to do it before casting the dots. Further, you can Contagion the RS'ed dots to get well beyond the Raging duration out of them.