I feel the investment in point in the aasimar tree made the 10% seem like a good number especially compared to the alternative path. It makes it worth farming those life’s to have enough racial points to afford them at ease. Maybe having race based hp be racial so it stack with basically everything would be a nice change. This goes for bladeforged and dwarf with giving bladeforged also 10% and maybe moving dwarf up the tree or keeping it at 5% as it requires less investment.
I really liked falconry stacking with everything. It’s available for any class and race and it’s a nice way to add extra hp to build if you have the ap to spare. I’m biased as I like the combo with aasimar/monk/falconry almost allows me to tank but with ki shout broken it never really happened.
Then the question about epic defensive fighting. I think it would make sense if tanks could use it too. Who has the feats sure, but the way it’s now any melee just get the same ho buff as the tank from their tree. Maybe have it be a epic bonus and give same or half the effect from shield mastery tiers. Maybe it’s too much but your tank should be just a ton of hp. Then melee second and then have casters after that.