Celebrim
Legend
Pants: I would assume so, because a Quickened Blasphemy every round would be just wrong.
Surefoot: I would assume it can use a Quickened Spell-Ability every round, provided that it never quickens the same power twice in the same day. I have no idea why the tactics don't use a Quickened ability in every round, unless of course, in 3.5 you can only quicken one spell like ability per day - which turns Quicken Spell-Ability from the uber monster feat into almost a waste of a feat. The inability to Quicken more than one ability would drop my assessment from CR 20 to CR 19 right off the bat, but then again Haste got nerfed too.
Surefoot: I would assume it can use a Quickened Spell-Ability every round, provided that it never quickens the same power twice in the same day. I have no idea why the tactics don't use a Quickened ability in every round, unless of course, in 3.5 you can only quicken one spell like ability per day - which turns Quicken Spell-Ability from the uber monster feat into almost a waste of a feat. The inability to Quicken more than one ability would drop my assessment from CR 20 to CR 19 right off the bat, but then again Haste got nerfed too.