1 & 2 are probably basic macros, but I'm more curious about the rotation. (1) is a basic macro but I'm not sure how often to swipe, lacerate, etc. The macro I came up with lost threat to the healer very quickly.

For (2) I'm thinking about using Wild Growth as the limiting factor. In other words, I can spam the button all day long but it will pause once I hit a Wild Growth that is currently on cool down. For example /cast [target=tankplayer] Wild Growth, Regrowth, Wild Growth, Nourish is a spammable macro that pauses until the second Wild Growth is off cooldown. Ideally this macro would cast Wild Growth on the healer and then continue to cast healing spells on the tank, but this involves the same problem I had in (3) of switching targets within a cast sequence macro.

So, I guess the real question is if there is a workaround for switching targets mid cast sequence.