If you mean like other players, it won't matter, the game doesn't let you make macros like that.

If you mean the devs, it, uh, also doesn't matter because they don't want it to be like that. They made combos a single button in PVP since it's a lot more twitch based than standard PVE, but for PVE they are likely to keep it the way it is for the foreseeable future.