Once you pass "one-shot" range for the various RSTS abilities (graves, tombs, earthquakes, etc.), there is no additional benefit gained from stacking stamina. If you pull agro on a boss, you die. If your healers don't heal you after a RSTS ability, you die. If an add isn't controlled and you hit it with a curse, you pull agro and die. You won't be able to stack enough stamina while wearing cloth to get through these situations. Hell, tanks don't get through similar sorts of situations without having healers on the ball, ready to heal them when the damage is incoming. Leave that problem to your healers and focus on what you do best: crowd control, debuffs, and damage. Much beyond 10k raid buffed, you're wasting item budget that can be spent on damage increasing stats.

However, I wouldn't knock VH gloves and hat for non-boss encounters or boss encounters where you're spending a significant amount of time beating on sub-73 adds. Since they have zero spell hit, you can gem them for pure damage and swap them in for your spellstrike and HoFT. This way you're busting out more crit and damage and not wasting a bunch of stats on hit that's not needed (for the specific encounter).

Still, I'd pass to mages and hunters that need upgrades from blues first.

Not everyone can play 10 hours a day. If I spend my gold on Spellstrike it means I will have to use crappy gems and enchants. the net gain in stats will probably end up less. the only advantage spellstrike has over tier 4 is slightly more damage and some spellhit. Not worth spending a month's supply of gold for such a small upgrade.

I recommend getting spellstrike hood aswell, it is just clearly superior to t4, and on par with t5.
Honestly, I mindlessly put "slacker" sign on every mage\lock with t4 helm.
And I don't get how do you count the mats as the "month" supply of gold, 10x70 +5x90 +200 = 1350g if you buy all mats on AH, and you can get around 70-100g/hr just by simple killing any lvl 67+ mobs.

I've been trying for figure out what you mean by "wasting a proc" for a few hours no and still have no clue. So, what do you mean? :o

It's even better now, with all the daily quests available. "Simon Says" in Orgi'la is worth approx. 12g, so is the catching netherays and bombing. Money nowaydays is so easy to get it's silly.

I don't know if it works this way but this is what he means.

Items have hidden cooldowns so say t4 proc is 10% but let's say it can't proc more than once every 30 seconds. So if that's true, if you proc the fire one on Immolate, you blew your shot at getting a shadow proc in this 30 sec window. but I dont know if it has a hidden cooldown.

It does not have a hidden cooldown. I double proc alot. That's including double proc of Flameshadow + Shadowflame and Flameshadow + Flameshadow (refresh) or Shadowflame + Shadowflame (refresh).

I need to dig up and update my post about procs with cooldowns I think :o
Thanks for clearing it up!

Most "Equip: Chance on ..." procs on items have a hidden cooldown.
Most (all so far) procs that are item set bonuses don't have a cooldown and can proc back to back, and refresh themselves, like this 2/5 T4 proc.
Most (all I know of) weapon procs and enchants that are "Chance on hit ..." don't have an internal cooldown either, like Thunderfury, Mongoose, etc.

What I mean is, because you can only be casting one type of spell at once, having both the +shadow buff and the +fire buff at the same time is not any better than only having one of them - one will be wasted no matter what spell you're casting.