Yes I did, and yes it can, but in lowman content WHM and SCH still crush RDM. In lowman content a SCH can hit an entire party with Regen V which often gives a ton of help to a healer, since its only 1 party, that covers everyone in the entire event. As for WHM, WHM can throw out free Curaga spells when people are low enough on HP, such as after a large AoE, which makes their MP last a very long time.
Never said that was its only use. Do you normally bring a RDM to an event to stop spells with paralyze? No, its an extra bit of help most of the time but your just as happy with a lower potency Paralyze from a WHM you were already bringing. When it comes to some of these mobs like the Pugil it goes from a bonus to a necessity because without it your DDs can run out of shadows from their /NIN to quickly and end up dead. As for gimmicks in general I was mostly meaning the Blind thing, where you cant really kill
Tutewehiwehi without it because its Evasion spikes when its not blinded and it gets access to two very powerful TP attacks, but with RDM casting Blind on it and keeping it that way the NM is very easy to hit and not nearly as bad to kill.