I agree with gm Joe that it does not apply to ranged attacks but Zen archery would.
I would argue however that intuitive attack does not apply to melee touch attacks since they are not natural attacks (though in some circumstances may be delivered by natural attacks).
If you were a creature who had natural attacks ex tentacles or a slam attack then maybe but for a standard humanoid who has their fists no.
If using fists, you count as unarmed unless you have improved unarmed strike (ex monk) and in that case they could be argued to be natural weapons (but slightly wobbly thinking).
Since you count as unarmed you are not making a weapon attack of any form and so can't benefit from intuitive attack there.
Note that Zen archery applies to any ranged attack roll, not just weapon attacks and so absolutely applies to ranged touch attacks
Regarding the very last part of the question about using intuitive attack for simple ranged weapons, yes it doesn't call out melee but unless they use strength there is nothing to replace with wisdom. A strength based simple thrown weapon may apply or if there was some other way to make a ranged weapon use strength mod instead first. So basically I again agree with dm Joe