I'll tell you what I have ended up kitbashing. I have a magical talent for rolling abysmally low for my pc's and oddly high for enemies on a consistent basis. In order to even make it to a d4 objective, I have started using the "Scarlet Heroes" system to read *incoming* damage. Outgoing damage is dealt as written in FOYT. In the event I lose a roll, I interpret the difference like I would a single damage die in SH. A difference of 1 is negligible; no damage taken. A difference between 2 & 5 results in 1 point of damage. 6 to 9 deals 2 points, and a difference of 10+ deals 4 points of damage.
I promise it's not your system, it's my luck. Ha ha! Even with incoming damage nerfed so severely, my rolls still resulted in sustaining nearly half my total hp in injuries from a single room using a d10 archery skill and d8 bow. 😂