Swiftcast also shouldn't be 100% only for raise either. Keeping people alive is more beneficial than getting them back up quickly and usually a swiftcast Medica or Cure II is all you need to prevent a death, not to mention it lets you do said spell while on the move.

You'd want a separate Swiftcast for that reason and since you are going to have 2 swiftcasts on your bar anyway you might as well separate it from Raise...

Multi-tier action macros (the ones that have, say, /ac Cure <t> and /ac Cure <tt> on consecutive lines) also have a chance to screw up if you mash the button while the GCD is almost up as the GCD may be down for the first line but come up for the second line so the second line would activate instead of the first. This is why some peoples' Blunt Arrow macros fail if they have a party message that gets displayed before Blunt Arrow in their macro.