Actually Alastar,
JaronK is still making some very illegal rules assumptions. Then saying that he's right. That.... is probably not intentional, but in any case what he is saying is not based on the actual game's rules themselves.
Ring of Blink makes the user act as if under the effects of the Blink spell. It's just like every other spell effect. Like any other spell effect, a creature's carried items are no longer affected by spell effects once they leave the creature's possession.
When under the effects of the Blink spell, things that leave your possession, such as say, an arrow or... surprise, surprise. a flask; they then also are no longer affected by spells that affect you. Giving the flask rogue no concern about miss chance. The Melee Rogue, or the one that JK seems to like so much, can't overcome that limitation, since he's holding his wielded weapons.
Basically, JaronK failed basic spell effect application. Then eiter intentionally, or unintentionally, decided to make that into a strawman argument to say why a ranged rogue can't use a Ring of Blinking. The Ring of Blinking tactic is common for bow and crossbow rogues as well. Having it not apply to flask rogues is ridiculous.
Not even knowing the basics of how spells apply to a creaature is actually unforgivable for someone who wants to even pretend to say that they can "quantify" what power level a character is, or is not. I mean, you're qualifying whether a spell caster is more or less powerful than a non-caster; but you don't know how spells interact with creatures. That's a pretty big problem, since it means you're probably making tons of other mistakes.
Personally, I find the idea of tiers to be folly. I've built fighters that can embarrass a wizard in the same party. Heck, even in games where the DM knows and has to approve every single feat, item, level, overall strategy and tactic that my character uses; I've built a non-caster that they aknowledge as being "overpowered".
Yet I know for a fact that a Wizard makes a better.... anything than most other classes... Wizards make better Grapplers than Monks (or Fighters, a full BaB class with feats coming out their ears); better killers than Assassins; better at absorbing damage than Barbarians; plus you know, having full spell casting, and the ability to relegate "bullshit utility spells" to indefinate storage in the form of scrolls.
Player ability and knowledge of combat options often has further reaching effects than writing "Druid" or "Cleric" on your character sheet.