Spell haste

Does spellhaste influence our GCD? Would it be nice to have some just to push the GCD's closer together so we can squise that extra skill into our rotation and havong holyshield after 5 GCD's instead of after 4 and waiting for 1 second?

How much spellhaste would we need ofr that? Anyone an idea?

It should do it. Don't think we can stack any tho.
The max spell haste gcd reduction one can get is 1 second, so every 2 gcds would allow you to squeeze a third given perfect latency. Guess for every 3 gcds you can in practice add another.
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Spankadin in development
Sit vis nobiscum!
Yeah, it's like having a dream that everyone hates you, but then realizing wow seriously everyone really does hate you.

Umm, holy shield has 10s cooldown, you can fit 5 GCD's and 1s wait time in it without haste. What am I missing?

For maths on how to calculate needed haste see this:
http://www.wowwiki.com/Spell_haste

79 is indeed to much. Well I'll just be happy with my 20 spellhaste from my sword and see it as an anti lag buffer.