Beating Ret Paladins in duel as a Ret Paladin. (trolling)

Here's a small trick my cousin discovered, it may be common sense but for some people it isn't, and it's hilarious

1. Challenge the other Ret Paladin for a duel.
2. Cast Lay on Hands on him after he accepts, but before duel starts.
3. He will get Forbearance debuff, which will be the reason why he won't be able to use Bubble.
4. Pop ALL your offensive cooldowns (trinket the stun and Bubble the other CC, if he uses it).
5. BOOM!
6. Win.

I tested this with my cousin, sometimes they won't even notice that and say in chat "Sorry I missclicked Bubble"