Well there are only a few jobs that need skill. Ranger, Thief, Ninja, Bard, Red Mage, and Black Mage. Ranger and Thief because of pulling and Ranger for Knowing when to control hate and when to tank the mob. Ninja is obvious, knowing when to cast what and not get hit...tough job. Bard you have to get your placement right and get your pattern down...you control the flow of a party. Red Mage same thing...you control the flow of a party. Black Mage, skill = stunning bombs and not pulling hate while getting those spells off....you BETTER know how to MB by now I swear to god.
Drg, Drk, War, Mnk, Pld, Whm, Sam...they have a pretty easy job. You just do one thing. I have noticed a difference in TP gain between 3 monks over the past 3 days, but it was almost negliable. Despite this, all jobs need good gear. If I dont have +Rng acc, I wont hit. If a Whm doesnt have Erase, it means you cant level in certain places.
No point having skill if you cant front for the gear.
Fae