Those will be fine (you can see which timers can be used on the reference page, by mousing over the PWM mark next to the pins) - Assuming you meant A2/3 not A2-4, since A4 doesn't have PWM on it (it's got a DAC, not a timer)
All the pins I listed in my post above should work simultaneously - As of the changes a few versions ago, very few of the PWM pins fight with eachother.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Those will be fine (you can see which timers can be used on the reference page, by mousing over the PWM mark next to the pins) - Assuming you meant A2/3 not A2-4, since A4 doesn't have PWM on it (it's got a DAC, not a timer)
All the pins I listed in my post above should work simultaneously - As of the changes a few versions ago, very few of the PWM pins fight with eachother.