I mean there were some pretty bad ideas in that thread.

I guess if you aren't planning to go beyond casual content (I don't even mean that in an insulting way), you can mess around with macros for your combos and stuff. But if you have any desire to eventually tackle extreme or even savage content, it's best you just learn to play the game properly and avoid most combat macros altogether.

There are a few very specific times that macros are okay in combat, and they never involve combos. Having a shirk macro that always targets person number 2 on the list as Tank is one, a rez macro with a message is another one (Don't actually put swiftcast and raise on the same macro, just put raise and the message together, lets other healers know what you are doing and hopefully avoid wasting their swift cast), and having aetherial manipulation always target the 4th or 5th slot as BLM (so you'll always instantly warp to a healer). Finally, having a macro that makes salted earth directly target whatever you are targetting isn't bad.

These are all pretty specific macros and are all generally for situations where not doing them would waste more time (atherial manipulation is nearly impossible to use effectively on controller otherwise). But if you put your combo abilities on macros, you WILL lose DPS, there's nothing ambiguous about this. You lose the queue up that you can normally do with abilities, which will cause you to clip and will lose you damage over the course of a fight.

So yeah to reiterate, I guess if you have no intention to tackle more "serious" content, then you are more free to do what yo want. But if you even think you might want to do Extreme content later on, you really should nip bad habits in the bud, and this would be one of them.