Spellpower and Haste do not clash on items. Haste is a secondary stat in budget and SP is primary. The secondary stats are Spirit, Crit, Haste and MP5. So... yeah, sorry, but no. MY 'rant' had nothing to do with the value of haste as compared to SP. Leave that debate to Holy Priest who use gems for haste, which is the only place where SP and Haste clash.
I'm not sure if it's worth debating this or not since you don't seem to understand what's being discussed at all. PoH is primarily used on aura fights where it will never waste HoTs. In those cases your shield actually 'wastes' just as much of those HoTs.
And no one was talking about LK 25H. Yes, keep spamming shields on 22 people non-stop during phases with Infests. Just don't try to apply that same logic to other fights. Infest is a unique ability that happens to be countered mechanically by absorbs. If that mechanic was not present then Discipline would be atrocious for that fight because other classes can deal with AOE spike damage much better than Discipline can. See regular 10 for the prime example of that. Discipline takes much longer to deal with the damage than the other classes. The advantage is only due to them being purposefully spaced to allow a Disc Priest to shield four parties. When the debuff becomes a non-issue like it in in 10N Discipline becomes useless because a single PoH could take the place of 5 PW:S. And so on. Yes, LK25H is a special niche fight that favors Disc. Get over it. There are 11 other fights in ICC and only a few of them are actually decent for spamming shields, while Discipline is only competitive when they have a fight where shields can be spammed freely...