Surely I can do this, here is a screenshot:
http://img264.imageshack.us/img264/7...2710184852.jpg
I used Power Infusion for it instead of an equipment switch, because it is clearly visible in the combat log, but still gives a siginificant boost to haste to get more ticks.
Explanation of the screenshot:
Test 1:
Corruption Tick
Power Infusion
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Haunt which refreshes Corruption
Corruption Tick
Power Infusion expires
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
So I refreshed Corruption between tick 5 and 6 (with Haunt), and there have been 6 more ticks.
Test 2:
Corruption Tick
Power Infusion
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Corruption which refreshes Corruption by itself
Corruption Tick
Power Infusion expires
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Corruption Tick
Again I refreshed Corruption between tick 5 and 6 (with Corruption), and there have been 8 more ticks.
The whole thing has great implications on affliction and demonology warlocks with their refreshement mechanics. Affliction should really look out for Eradication, the 20% haste might be a big boost. Demonology greatly depends on whether multipliers are kept or not, if the same criterias as in wotlk still apply, he might have to renew it while in metamorphosis.
And regarding crit/multipliers: I still don't believe that they are updated on refresh (by a third spell), even if some people here at EJ take it as a fact.