I realize half the deck is two stars, but five of the cards in the deck are dangerous offensively and the other three are elite defensively so there are a lot of practical winning combinations if you think about it. Managed two get to over 1200 ELO in small playing time over two days.
4 cards at 2 stars is a little too risky IMO, it would be too dependent on the luck of the draw
Personally I'm not a huge fan of charlie anymore, I would much rather use muze and buff the nightmare side
wanda and brittany are my favorite 2 star pussycats but it depends on that week metagame, wanda may be more useful than wanda in weeks with a lot of SOA
if you "free" 2 stars by replacing charlie with muze you can than improve the nightmare side, for example pan or edwin instead of sheitane and karrion instead of glorg, also if you already use pussycats as dmg reduction you may want to consider replacing artus with phyllis or mawpin ( although mawpin I find to be a little less reliable)