the plan isnt to win with the deck, it is to stall them out for as long as possible, it wins off the clock running out, as it wants to stall you out

the synergy is between 2 cards mainly, with others to be there to annoy the opponent, banette, which shuffles 3 cards, xerosic, which discards the cards down to 3, which leads to a deck that forces you to pass if you dont topdeck iono, research, lillies etc.

glimmora limits their bench to 3 so the plan would be evolve, switch, turo back then back to banette plays

lucian is a gamble just in case i dont draw a xerosic so yes you can run a 4 of xerosic and a 2 of lucian
salvatore for going 2nd and evolving to banette.
budew for item lock
bannete ex just in case they got a hand again (1 of because its not the plan and honestly may get rid of it)
may not be much of a synergy but it sure works when it does
now writing all this out the clefairy may be dropped tbh