I personally really like the dopamine rush I get from hearing my phone go *cha-ching* a few times a day, so I often undercut (or get close to it) myself
[22] Rather than take their form based on their holder's Deck, they take a form relative to the legend that is described
negate the Summon or activation, and if you do, destroy that card. Evolzar Dolkka During either players turn, when a monster effect activates: You can detach 1 Xyz Material from this card
If "Axel" and "Roxas" are used as materials, Riku becomes a lightning rod for your opponent's effects while getting no damage whatsoever: This means that while "Aqua" is busy getting an incredible amount of ATK, Riku can protect her from card effects
The downside is, unless you actively want to be dumping your hand into the graveyard, you need creatures with high power in order to make Greater Good worth it