No love for Royal Guard? *gasp* ^^
RG is notoriously the most difficult style to not only use but to master.
Primarally because it doesn't require knowing what moves you do, but what your enemies do.
However, the balance comes when you realise that it negates all damage if used right and unleashes one of the post devastating moves in the game.
Essentially... *assuming RG is fully upgraded*
If you press the style button JUST as an enemy hit lands you will negate the damage and start filling your Royal Meter. This is a fun thing, because all those annoying moves that are often difficult to avoid can be countered with ease.
When the Royal Meter is full, if you use Royal Release (towards and Style) you will unleash Damage equivalent to the amount you defended against.
This is enough to put a massive dent in a boss etc.
There are no tricks of gimmicks, nothing to analyse with it, if you block the hit successfully, it has worked...if not, you take damage.
ITs an awesome Style, one I thoughly abused in DMC3 (where I feel it was superior)...but even in DMC4 (if not more so due to hot-style-swapping) you can swap between the offence of Swordmaster and then to the Damage Negating Royal Guard...make the most of all Styles ... its a hellava lot smarter and more fun that just mastering one ^_^