Not sure what you are asking for here. I'm sure you understand dropping Grit and using Blood Weapon is sacrificing defence for offence, it's up to you to determine if it's a good idea to do so based on the mob you're tanking and the ability of your healers. It's utterly dependent on your own circumstances.

As for Darkside keep it up 100% of the time you are engaged. Only drop it if you don't expect to be attacking anything for at least 6 seconds.