If you are wiping at 45% on phase 2 due to WW adds you have a quite big DPS issue. Aim for 2nd intermission on <40% (you won't be able to drop it much more on a first kill, but we got it to 35% for our first kill and our DPS is kinda bad).
Regarding WW adds just nuke them when they spawn while making sure they are not within 5 yards of other adds. Unbuffed they hit for nothing, so don't try to aggo them. Each DPS should pick one up and burn it.
EDIT: Just glanced over logs and on your longest try (10 min) you only have 2 DPS over 150k. One is a frost mage (with frost bomb) and the other is a warrior with 17% of his damage coming from bladestorm so they are just doing aoe.
Checking damage done only to garrosh (
http://www.worldoflogs.com/reports/4...2319&target=14) makes things pretty much clear.
This is going to sound harsh, but it's your core issue. People doing under 100k effective DPS on single target don't belong on a raid.
As a comparison here is our first kill damage on garrosh only ->
http://worldoflogs.com/reports/u5kdi...8338&target=33. And as i said we have multiple DPS issues (heroic protectors dies just on the enrage, norushen enrages like half of the pulls, and dies with <10 seconds on enrage, etc). So pretty much tell your DPS to step up big time.