You can not give some definite answer about the value of range talents given the varying nature of the fights and the extent to which you're actually required to run. Compare nature of the Ignis fight with General V's and you'll see my point. But in general (in practice), yes, range is a good thing to have and can even give a dps advantage in certain encounters.

My classic example is Sartharion 3D. Due to the positioning of Sartharion (if you're looking down at the map, he's at the north end of the island), if you have 2/2 Flame Throwing, you do not need to move at all when a Flame Wall comes from the South. In this case, we called that a "side" wall. When you're looking down at the map, the flame wall that came from the right side of the screen would have an empty row at the south end. The flame wall that came from the left side would be called the "center" wall, because its empty row was in melee range (approximately).

With 2/2 Flame Throwing, you could stand in the clear space while the side wall passed and still DPS Sartharion. 3-6 yards less, and you would have been in the path of the fire.

Another example could be Grobbulus and needing to run out when you get the debuff. Sometimes blinking only gets you so far -- having to run 6 less yards is 1 less second (there and back, depending where your drop-off points were, naturally).

So I realize I haven't given any Ulduar fight examples, but I guess any easy but ambiguous answer would be: longer range means that on fights in which everyone needs to spread out, you have that much more control in where you can stand and still DPS the boss.

I don't know -- how far off are you on? Are you running something in 2.2.4 that I have listed under 2.2.2? (I haven't updated every list). Are you sure your trinket procs are all set correctly? Everything has its correct socket bonus? No gems are a bit off, etc.?

I tried one night of 10-man Ulduar with Glyph of Living Bomb/Glyph of Fireball/Glyph of Molten Armor. Half-way through I concluded that I'll be switching back to Glyph of Imp. Scorch. Having to refresh Scorch 4-5 seconds before it falls off, and having it fall off due to many things that can delay my ability to refresh it, was far too aggravating. Similarly, having to ramp up Scorch on every add that had a marginal amount of hitpoints was very time consuming. It was easy in BC, because practically every boss was just that one boss for the entire fight. There was no Hot Streak, no Pyroblast, just straight Fireball/Scorch, and very few adds.

Looking over your armory, Draagun, you definitely have enough spirit for Glyph of Molten Armor to be worthwhile: (601+52+80)*1.1 = 806, which gives you 3.51% crit from the glyph alone. Compared to Glyph of Fireball, this is probably the right move. I'm not quite at that point yet, so I'm still swapping out Glyph of Molten Armor for Imp. Scorch.

However, I've given this all some thought, and running with Glyph of Molten Armor (or Fireball) instead of Imp. Scorch could be, practically speaking, very close in DPS terms. Ideally, you would only cast Scorch on mobs that are going to be alive for more than a few fireballs. The reason being, you're already getting 6% crit from Molten Armor (at your spirit levels), and then another 3.5% from the glyph. Comparitively then, that's 6+3.5+3 (12.5%, including Imp. Scorch talent) to 6+5+3 (14% with Scorch debuff).

In other words, if your options were to cast scorch on only the mobs that are going to survive for a few fireballs, then without Glyph of Molten Armor (and with Scorch glyph), you'd be trading 3.5% for 5% (this is regardless of the fact that it may be better to use Glyph of Molten Armor over Glyph of Fireball), and practically speaking, it's worthwhile to cast scorch on every one of these mobs, since it only takes one Scorch to put the debuff up.

Without Glyph of Imp. Scorch, I would say that on any mob in which you'll need to refresh Scorch for another 30 second duration, it's probably beneficial to ramp up 5 debuffs of it. In all other cases, it's probably best to not cast Scorch at all. Sure, you're down 5% crit then for that duration, but compared to pre-3.1, you're still technically up with Scorch, and only slightly behind without Scorch.

For straight Fireball spam (naturally the crit rates of Living Bomb and Pyroblast matter, but we'll ignore that):

Pre-3.1 (with Scorch Glyph, and FB+MA since no LB glyph): 10% Scorch + 3% Molten Armor + 2% MA Glyph + 5% Fireball Glyph = 20% (required 2x Scorch casts)

3.1 without Scorch, with ~800 Spirit (MA+FB glyph): 6% Molten Armor + 3.5% MA Glyph + 3% Imp. Scorch talent + 5% FB Glyph = 17.5% (down 2.5%)

With 5% crit from Scorch, requiring 5 casts, this increases to 22.5%, up 2.5% over 3.1. Naturally, you're back to 5x casting instead of 2x. On bosses (and mini-bosses), this is worthwhile. On everything else, not so much.

Comparitively, if you replace either Glyph of Fireball or Glyph of Molten Armor with Glyph of Improved Scorch, you're practically guaranteed 5% crit on everything at all times, with very little down time due to refreshing, and at only one cast, there's almost no mob worth not casting it on. I'd say on a straight nuke fight, it's clearly still a DPS loss, but for everything else, the opportunity cost of having to 5x refresh is too high to not run with Glyph of Imp. Scorch. And yet, at the same time, the thing you have to consider is that, even when you're down 5% crit, you're not really down 5%, since you have crit coming in from other glyphs (be it FB or MA).

It's when you consider the time spent casting scorch (think heart phase on deconstructor, or the many phases of mimiron, or all the adds on freya or auriaya) that you lose DPS. I've probably gone on long enough, but my general conclusion is that most encounters in Ulduar seem to benefit from an instant Scorch debuff over the "passive" benefit of a minor increase in crit. And of course, there are worst case scenarios where you are unable to refresh mid-fight, and then you're back to ramping up scorch 5x.

(I should mention that I realize it's overkill if you have two mages both with Glyph of Improved Scorch, but that also assumes you run only 25-mans, or that you have more than one mage in a 10-man group.)

I think it's safe to assume that they will match the colour of their lesser counterparts, (eg. Runed Dragon's Eye = Red, just like Runed Scarlet Ruby)