The 858D things will get you by for most things, with all hot air stuff, be patient, and use flux,
Main technique is to nudge the component before trying to remove, when its up to temp most components should be able to be pushed about with surface tension restoring them, that is when its safe to lift.
Main features are a power switch if its an "auto off" one, so far never had any trouble, but dont trust it 100%,
A few nozzle size choices, Its more about keeping the heat only where you need it,
And variable airflow, for tiny stuff too much air blows stuff off the board.