So, the problem here is that you're going over the power-channel budget, which on a Proffieboard is 6 channels.
You would like to use 8 power channels. (2 for the blade, 1 for the crystal chamber and 5 for the accent LEDS.)
The easy way to get around this limitation is to use pixels some of your accent LEDs. However, if that not an
option, it is still possible to do this using an external FET. Basically, you could get a FET or PEX to create
an additional power channel. The external power channel won't be PWM capable, but you don't need that to control
neopixels. An external FET could be hooked up to Data3 for instance, and used to control the power to the main blade.
The remaining LEDs will now require 6 channels, which is exactly what you have available.
thank you! this has been very helpful.
edit: out of curiosity. I assume multiple Led's be connected to 1 led pad? What is the power limit to these pads? Can I connect 2 led's to pad 5 and 2 more led's to pad 6?
Assuming that we're talking about regular LEDs (not neopixels)....
You can connect multiple LEDs to the same pad, but you can of course not control them individually if you do so, they will light up at the same time and with the same intensity.
The power limit for the LED pad depends a fair amount on the air circulation around the chip. The chip is technically capable of 10A per pad, but that only works if the air circulation is good enough. Somewhere around 5A should be pretty safe though.