Well she needs a really good assist, Iron Man's Unibeam is probably the best once, unfortunately Iron Man isn't too good a character. He does have a fairly easy TAC infinite though. While X can function alright on point she's probably better off 2nd, with a good battery in front so she can come in with plenty of meter. Dante works well in this regard, and his Jam Session assist allows her to get an unblockable setup on an incoming character.
There's a pretty good player that plays this team, I believe DapVip is his name, and he showcases what a good X-23 team should look like. I feel each character doesn't do too well against the top tiers, but when the team works it works well. Definitely a case of the sum being greater than its parts.