If there was a thread like this then sorry. Please link me to it if it happens to have an awser im looking for.

Since I started MBing I tend to use

/Focus Dzonatan (my main)
/assist focus
/follow focus

but everyone in a while I bump into a problem with is that sometimes I need to press that macro in order to make all of my slaves target designeted NPC or mob. Since then I was wondering if /target=focustarget is somehow superior towards /assist focus or is it just some sort of latency problem? If not that can some experienced user could explain in details with of those macro's commands differ?