I have a question about the denso coil sticks.
The resistance of the stock coils is about 3 ohms. It's hard telling what the impedance is - the impedance includes the inductive reactance. For this to work, the resistance of the coil sticks should be six ohms, so that the ecu still sees a load of three ohms, overall. There's no way to compute the real deal without knowing the inductance of the coils and the coil sticks but, again, the inductance of the coil sticks should be twice the inductance of the stock coil.
Cutting through the chase, maximum power transfer (between the ecu and the coils) occurs when the impedance of the load (the coils) equals the impedance of the source (the ecu). And so, if these components are not properly matched, it would be very easy to drop too much power across the source (the ecu), causing it to overheat, and ruining it.
Since the inductive reactance varies with the rpm (2 pi x the frequency [rpm] x the inductance, in Henrys) here we have a circuit that is built to withstand a lot of mis-matching, in terms of power distribution. But paralleling 2 coils across the outputs of the ecu (which, in essence, is a transistorized amplifier) - WOW! Risky.
Have you done this before? Did it actually work?
I just want to let you know that there is a pretty good chance you will fry your ecu.