1. Maybe I am blind but I see in your profile 23,4% dodge and 19,4% parry, so umm... how your avoidance can be 55%? I am really curious.
2. Trinket gives 1110hp (more with buffs because it is stamina, not raw health points). Now just count your additional stamina from gems (and maybe few enchants) and see how much you can get from them. Of course remember about gem bonuses.
My personal advice: keep blue trinket.