Mouse over macros so you dont need to keep tabing around to put dots up,

/ac "Bio II" <mo>

/ac "Miasma" <mo>

/ac "Physick" <mo>

in any game, dealing with a class that uses dots, it is alot easier to just mouse over adds to dot while still staying on your main target to nuke,

you can pretty much use mouseovers for everything, for nin I use mo's for goad only, and later shade walker enmity transfer buff to tank.

I hope this helps, if you dont use mo's sometimes you may tab to the same target or just a target you dont want, however since you aren't main targeting them you will need to memorize your debuff durations.