XIVAnalysis is a good guideline but don't relay too much on it. There are times it flat out wrong happens a lot actually because it doesn't take in account somethings. There are times it said you clipped but you HAD to clip due to mechs, and some people think clipping is the end of the world when in some cases its a dps gain depending on the fight.
Cases with samurai, there are times you'll do yuki instead of gekko due to a certain part of mech but xiv will say you were wrong when players proved that doing X thing was a gain.