And nazrakin, yes it won't help u if u get an orb burned above the 3 stacks..and it might be situational but it does about one thing - ensure u will not need to recast LS for the next 10m
And look at quote above, there aren't many dps oriented glyphs cuz majors are utility mostly/marginal dps gains/incalculable ones. Although unless they create fights where tS would be useful i'd go with 5% gw speed instead of thunder glyph
Edit: just logged the ptr...sadly Shocking is a primal glyph
So umm yeah there's not a single str8 dps Major, atm :
-chain heal
-chain lightning
-Elem mastery
-GW
-Healing wave
-Grounding totem
-Hex
-Lightning shield
-Shamanistic rage
-Stoneclaw
-thunder
-totemic recall
-Fire nova
-frost shock
-Healing stream totem
Bolded the ones i picked for my shamy, and sorry for the wall of text lol :O