Listen my friend...I am going to give you the most important advice that I want you to remember by here as you move on to the next juncture in your journey. I am passing on some hard-earned wisdom that's directly borne from my own personal experiences.
The person who is calm, centered, and grounded ALWAYS has a leverage over the nutty ones.
Whenever there's a battle to be fought (or 'discussion'), it helps to do breathing exercises (Tia Chi is one good example) to ground yourself and then take on whatever needs to be done.
Whatever you do, do NOT get into arguments with H. I know you know this, but bears repeating to emphasize it here.
You got this, girl....and how you cannot with this fabulous team on/at your side?!!