What are your thoughts about Inquisition?

Inquisition
Increases Holy damage done by 30%.
Increases critical strike chance by 10%.
10 seconds remaining

I basically made the following DPS Key map in ISBoxer:

DPS KEY ( press or release ):
Assist focus
IWT
Hammer of Wrath > All
Excorcism > All
Crusader Strike > All
Judgement > All
Templar's Verdict > All

The problem is, i want to use Inquisition which can be used with one holy power. With one HP you will have the buff for 10 seconds. If you use it on 3 HP you will have it for 30 sec.

I want to go in arena and get 3 HP, use Inquistion for the DPS buff, then switch over to the key map above to use holy power on Templar's Verdict.

What are your thoughts?

Thanks in advance,

Negativ1337