Preparing parents for Grand Live

Hi! I’m aware that the next scenario wants stam sparks mostly with Trackblazer spark as a nice bonus, but what umas should I be farming them with ideally? Are there inherits that will get a lot of mileage during the Grand Live CMs apart from the usual suspects (Sky, Oguri, Dober, Ryan, Taiki, Nishino, Red Maru, Opera)?

Also, for mile CMs would you want stam or power sparks in Grand Live?