if you know they are going to wideswing, hold wide
if they are slowly contacting (so you know they are doing micro peeks) then hold tight
if they are stuck in a corner or you have major angle advantage (because they are peeking from close to the wall, so then they have to wide swing) then hold wide.
for example, you are playing an off angle from Ascent mid market while holding B main. its a slow round and you're waiting for their B lurker to peek you. you know he won't wide swing because hes clearing every angle, so you hold tight.
if they enemies are running thru a chokepoint while trying to get onto site, yes hold wide
easy rule of thumb is: if enemy is close to wall then they probably will have to wide swing, so hold a bit wide (only need to be a little bit btw)
go watch zasko III, he explains mechs well for anyone below ascendant