As a tank, what should I know/do to make it easier on Healer?

[Cynfael]

Swiftcast has no bearing on anything but the next spell hence "it affects nothing". You have to stop to cast everything, because all casts are interrupted by movement. Part of the illusion that you aren't stopping when you Swift+anything is the same as Regen and Aero, there is no "cast time", hence you stop for time that effectively zero.

Do I need to get out a video?

What are you on about? Of course you can't SS II players in combat....

You said that Swiftcast doesn't affect movement, which simply isn't true. At no point do you have to stop moving to cast spells with "instant" cast times. There is no "illusion".

Even if you want to make this about aggro (which is a different issue), you wouldn't be trying to land SS II between dungeon pulls, anyway. All you need is to SS the tank, which you can regardless of in-combat status.

On an tangential note, why on earth would you need to macro SC with SS?