Use Long Feng to put a +1/+1 counter on Persist Creature A, cancelling its -1/-1 counter
That said, Collected Company has been prioritized the way that it has because its an incredibly powerful card with a solid history of success, so maybe abandoning it shouldnt be the first step
Creature - Dragon Hide in Plain Sight Look at the top five cards of your library, cloak two of them, and put the rest on the bottom of your library in a random order

Psychic Common 091/130: Misdreavus Psychic Common 092/130: Onix Fighting Common 093/130: Piplup Water Common 094/130: Ponyta Fire Common 095/130: Rhyhorn Fighting Common 096/130: Roselia Grass Common 097/130: Seedot Grass Common 098/130: Shinx Lightning Common 099/130: Skorupi Psychic Common 100/130: Sneasel Darkness Common 101/130: Starly Colorless Common 102/130: Stunky Darkness Common 103/130: Turtwig Grass Common 104/130: Wurmple Grass Common 117/130: Energy Search Item Common 118/130: Potion Item Common 119/130: Switch Item Common 123/130: Grass Energy Normal Common 124/130: Fire Energy Normal Common 125/130: Water Energy Normal Common 126/130: Lightning Energy Normal Common 127/130: Psychic Energy Normal Common 128/130: Fighting Energy Normal Common 129/130: Darkness Energy Normal Common 130/130: Metal Energy Normal Common
There's hundreds of tribal support cards for you to mix and match with your changelings, more than you could ever fit into a deck
With an ATK of 2150 and DEF of 1950, this card will almost guarantee the defeat of any opponent in the first Ancient Egypt portion (except for Villager 3 and perhaps Seto)