Since you can only make a boot feel softer but not stiffer, I'd suggest starting out with a stiff boot and seeing what you can do for forward flex.
* Only slightly tying the top 2 eyelets, but cranking heavily on 4&5, this pulls your heel in. Suggesting wax laces to avoid loosening.
* Skipping 1 or 2 of the top 2 eyelets. Forward flex gets easier, ranging from skipping the 2nd eyelet (noticeable) over skipping the 1st to both.
* Installing a skate lace extender. 55 Flex is out of business, but others exist (example).
* Wearing gel ankle sleeves. By distributing the pressure from the lace better you may feel more comfortable pushing up against it.
I personally found my sweet-spot for top-end Bauer to be skipping the 1st eyelet and the gel sleeves, with Mako/VH/True it is skipping the 2nd and the sleeves.