Team Rocket cards usually revolve around aggression and being able to stomp your opponents at the expense of your own Pokemons health
For Nicol Bolas to be worth a pre-order at $30 it would have to be pretty stable in the $30-$40 range, which would only happen if Grixis instantly became the best deck in Standard
Cards like Blacklance Paragon, Dusk Legion Zealot, Kitesail Freebooter, and Seekers' Squire all could be better than Yarok's Fenlurker, so feel free to experiment
Aesi, Tyrant of Gyre Strait is a big beast that would cost you around $10 on its own, while Giggling Skitterspike and Ashaya, Soul of the Wild arent far behind
You can just as easily use it as a semi-Demonic TutorDemonic Tutor, if you know or can guess what cards are in your opponents decks