I can't think of any situation aside from tyrant tusks that I'd use it over GH to be honest. 30 ACC is not worth an atma slot, use food if you can't cap in gear and cruor buffs with RR
yup only time i dropped GH was for einherjar when spamming my sobeks
still got me on occasion too lol
Depends on job and mob. GH is usually a good compromise between dps and eva, so if you can handle the mob with that go for it. Switch to C&D or SS if the mob has higher acc, depending on the food you are going to use and on mob eva/def. Basically use your brain, there's not a "better" one.
And lol at some of the previous answers.
If you're on an evasive job to start with, RR/GH/DD is going to cap your evasion regardless what gear you're wearing. Your best aid in figuring this stuff out is just to use a parser and see what evade rate you're parsing. If you're evading 80% of the time (getting hit 20% of the time) then you're capped.