Well, Vang...
Your attitude is obviously getting you nowhere. I, too, love to maximize my EXP sessions. I also love to have great gear, and a leveled subjob. I in no way, however, feel that it's necessary to call other people out (especially strangers) for a subjob that's underleveled. And here's my take on RNG gear... which I really don't understand, and will probably get massively flamed for this, but I just don't give a fuck.
-Emperor's Hairpin. +3 AGI, and +10 EVA is nice too. (+3 DEX, but... honestly, how much will that matter with the -ACC on your Racc rings, that is if you're not using Sniper Rings, or you don't have gear-swap macros to bring in your +RACC rings for your DEX/STR rings everytime you shoot, but I bet no rangers do this as it isn't as rewarding as the gear-swap macro would be to a job like SAM or WAR or NIN or whatnot)
-Leaping Boots. +3 AGI, and another +3 DEX that just doesn't matter all that much in what a RNG's job is. You might hit once more per fight with your daggers in close combat with the +6 dex. Congrats!
Together, I believe the cost for those items are something around 600-700k RIGHT NOW on the AH.
Now, look at the alternatives.
Noct Beret +1. +2 AGI. Probably costs around 50k, hell, maybe even far less. I've never looked at the price of one of these things. You lose 10 Evasion, which I think is a much much bigger blow than 1 point of AGI.
Bastokan/Republic Greaves: +1 AGI, In areas in your nation's control, +3/4 ACC, +3/4 RACC... I think the Republics go for around 50k or so. Probably more. I'll take POSSIBILITY of +4 RACC over the 2 AGI and meaningless +3 DEX for a RNG anyday.
So, you're paying 600k or so for 3 AGI, 10 Evasion, and 6 DEX (which is basically meaningless for a RNG.) The Evasion is nice when your shadows go down... but... if you're pulling THAT much hate, the RNG should learn about aggro control or it's time to get a new tank. 3 points of AGI are NOT going to make or break a RNG. You know what does?
The best possible Bow/Gun/Xbow and the best Ammo you can find for your current level. The 600k you save on 3 AGI and 10 Evasion can put to use elsewhere. Hell, if you people DO think +2 AGI and +2 Dex lost from leveling your NIN sub for RNG matters THAT much, then I better see you same people using the Emperor's Hairpin and Leaping Boots and would expect you NOT to criticize others if they don't meet up to your standards.
Hell, the job that benefits most from the Leaping Boots is THF. That's hands-down, and you can EASILY see the difference between a THF who is using them and a THF who isn't (in SATA damage). The difference between the boots on a RNG and a RNG who isn't wearing them is so negligable it's laughable. The Hairpin is excellent for Thieves, but you don't see as many results for the Pin for the Ranger... although I really truly believe the +10 evasion is the absolute best thing about this piece of gear for any job other than THF.
There you go, the idiot BLM spoutin' off on a job he's only taken to 21, for those of you who like to say that "if you don't play a job to X level, you don't know jack about said job". Well, I have a fucking brain, and I know how to figure shit out. Common sense tells me that 3 AGI and 6 DEX isn't giong to make or break a RNG. Even less the +2 AGI and +2 DEX the Original Poster loses out on having an underleveled subjob. Job traits and abilities are the #1 reason to have a sub. The stats are just a nice convenience.