Don't get too bunched-up about it. The idea is to find a balance of enough amps to fire them at low cranking voltage, yet not burn them up at higher revs. I run the calculator for 14V at 85% DC as the most current the injectors will ever see, and all other operation will be less. Hopefully they get enough amps when cranking to open properly. I don't know your type, but I accidentally ran some GM TBI injectors while testing firmwares, for many miles with no
resistors. No failures.
Not saying you should, but I don't get stressed about it like I did.
I would try what you have, and do a quick bench-test for injector operation (clicking) in Hardware Test
mode. Use a lower voltage if you can to duplicate cranking voltage; but in any case if you're cranking and not getting enough fuel you have a first point to look. Check that your injector latency (dead-time) is set well. Squirt some fuel in to get it running and raise voltage, and tune it from there for easier starts or until you change resistors.
TBI works far better than most assume, is easier (or more forgiving) for dialing-in, and is a very good first-step to get stuff sorted. I wouldn't throw it out yet. OT - I'm driving a couple hours away to pick-up a full V6/V8 TBI unit, fuel system and harness in a couple days for yet another TBI project. I like them as they are simpler and allow exploring tuning and the opportunity to tweak them to near MPFI levels with clearer cause/effect feedback. Anyway, choose your path and have fun!