Okay, here’s what I’m saying regards to all these chars in the end.
BH is not unrushable, but if you put the kinds of teams around him that people put around Storm he can do a lot of the same things that Storm does defensively, only at lower risk to himself and with a lot better of a clear-out of the low ground that Storm uses to defend herself from rushdown together with drones and Commando. Jumping fierce demons, once you can throw them cleanly, will protect you for a half hour, and if you protect that position stubbornly enough BH can protect himself from Magneto just fine. With Sentinel and Commando he’s also got DHCs that hurt almost as much as Storm/Sentinel does (read: for practical purposes, you’ll kill Magnus if you land one), so he can punish Magneto mistakes just as viciously.
Magneto ultimately is still a powerful rusher because once he gets going on a tear and gets a hit and position he creates a rather horrifying slippery slope for his opponents. He has almost blinding speed, he can combo any poke just about anywhere on the lower half of the screen into either infinites or snapbacks, and he’s the only character in the game with both a long range snapback that can hit multiple characters and a practical ability to chase down the assist character and launch them to death. Even so, if you can take the near-ground position away from Magneto on a consistent basis and force him to go over the top, then many, many characters can make him look very bad. That list can include Storm/Sentinel, BH/Sentinel, Sentinel in general, Spiral, Cable, Strider, MegaMan, and even BBHood/Juggernaut combinations. At some point, yes, Magneto is better than the pixies in the game, but if you can stop him from landing a hit, just about ANYBODY can beat him.
Iron Man doesn’t have many of these strengths and he’s got all these weaknesses a lot worse. He’s slower. The smart bombs help a little bit in keeping characters from feeling too comfortable in the near-ground position that’s necessary for rushing, but at some point he still has to land a hit and he doesn’t have a whole lot of chipping power to make up for it.
I mean, set aside the love for the infinite and let’s really compare Iron Man to something like Doom/Sentinel/Cyclops. Doom has a triangle jump that’s not particularly faster or slower than Iron Man’s. His photon charges are better than Iron Man’s smart bombs for controlling space. He’s got longer ranged pokes on the ground and the air. He’s got the jumping fierce for cutting off the near ground position (although Magneto can get under it fairly easily if he’s not careful). By throwing yellow beams up in the scoreboards he can basically stay out of reach of anybody who can’t fly, airdash up, or have Commando or BH assists for ridiculous periods of time. And if you’ve got the reflexes, any poke in the air or the ground can be combo’ed into a photon array that will DHC into somebody probably getting killed, just like Storm with combos into lightning attack/lightning storm. Storm has a few things that Doom lacks in this category… but, really, Iron Man doesn’t.
In fact, if you really think about it good and hard, IM/Sent/Clops isn’t a revoltingly bad team by IM standards either. However, even the most hard-bitten IM fan can’t really give a rational argument that that team is going to be dramatically better than it would be if you took IM off of it and replaced him with Doom. They’re both teams that are going to have their strengths and might even be decent against a purely rush oriented team because they can defend themselves reasonably well and getting hit by the first character on either of them gets your first character killed and puts Sentinel on point with a lead. However, they’re both still fundamentally flawed teams because they’re going to get horribly out-turtled by Team Scrub and their first characters are slow enough that they’re still probably going to lose most rush fights to Magneto-based teams if they can’t put down an ironclad lockout, and they’ll probably also get out-turtled, out-rushed, out-everythinged by Storm/Sentinel teams.
It is not to be missed that the best Iron Man team is Mag/IM/Sentinel, where IM either never actually takes point and serves almost entirely as a DHC waypoint between IM and Sentinel, or he takes point for giggles when Magneto’s already done the hard part of his work for him, either by having already destroyed most of the opposing team or by killing someone with a DHC into IM leaving IM with a relatively easy job of guard breaking the next character where he’s under no great pressure to do so because his team’s already ahead anyway – either way, preventing Iron Man from having to chase down an opposing team by himself to win or lose a match, which he’s simply very bad at doing when the chips are down.