My Deathknight alt (currently mostly a 10 man project since my Priest needs nothing there, though likely to move to 25 man soonish as well at this rate) is also Frost specced, using the following Glyphs:
-Obliterate: With a decent 2H and the appropriate talents, Obliterate is a rather big source of rune usage, and buffing it considerably is rather nice for your threat generation.
-Icy Touch: The extra runic power from this allows for more Frost/Rune Strikes, with Rune Strikes eating up a considerable amount of runic power already.
-Frost Strike: Making it cheaper allows for more use, and as such higher TPS.
-Pestilence: rather default choice.
-Horn of Winter: Having a 3 minute duration instead of 2 is a nice quality of life improvement with very few truly useful minor glyphs. (While casting Horn can be nice, runic power and all, I find I rarely have free GCDs when trying to generate max TPS, between my rune rotation and Frost Strikes)
I personally rarely am so low on Runic Power that I have problems using Icebound Fortitude (thanks to the aforementioned glyphs). Dark Command may have its moments, but so far I have yet to notice not having it.
I disagree with the above poster. As a frost tank I think straight away Unbreakable armour + IBF glyphs.
UA glyph is maybe up for dispute, however the talent is getting changed next patch anyway so that doesn't really matter, (it's getting changed to be a straight up damage absorb spell like a shield). Being able to cast IBF on no runic power is important imo.
I have been using Frost Strike glyph, however recently changed it to runestrike to see if it worked nicely. I may be being biased because i'm seeing alot more crits with it.
Has anyone worked the maths out for glyphs. I would be interested in finding out the optimum se tup.