Do bonuses when attacking with teammate apply to spells?

Do things like minor threat( the 10% hit to crit when attacking same enemy) apply only when you are actively target someone with a physical or ranged attack?  Or is it that spells count as targeting and supply/trigger the bonus for others?  Also, if anyone knows do you have to be hitting them for it to stack or does simply targeting still work(as in you are running towards them or reloading)?

I have tried to test minor threat and I have not seen it work but I could just be a bit unlucky.