I don’t mind helping you get up to speed with Spencer if you really want to do that, HOWEVER I do not recommend swapping him out in place of IronMan. While you get a super sweet bionic arm…you lose a bionic body!
You might not miss the up grapple for limited anti air, incoming character mixups, and combo extensions…but you will most certainly miss free charging star, cartwheel crossups, some chip damage, easier dhc’s, and an assist that works for deadpool.
The team you have now is not a bad team, it’s just in need of some discovery of it’s function honestly. After watching both sets you’ve done, it seems that you have 1 major thing holding you back…
You play all characters almost exactly the same regardless of situation. Of all the people on your team, you throw the most projectiles with the guy who has the least effective (Cap). Your goal with Stark & Deadpool is ALWAYS to get in and score a combo. Both of those characters never have to hit you with a combo or even a clean hit to kill you.
They both have fantastic projectiles (aka full screen extensions of themselves, think Dhalism from Street Fighter), but you’re not using any with either of them. On top of that IronMan has STOOPIDLY good reach with his M, H, and S normals, all of those you can use to keep people at bay while destroying them with projectiles. To save me on some typing, take a look at this video showcasing some of the amazing strengths of IronMan (it’s a tutorial by a fellow SRK member BlueBomberXTJ)…that will get your mind into the mode it should be in with him. He can also rush down if you want, BUT I recommend learning his zoning ability over everything else especially since Ultimate is coming very very soon…I don’t even double jump anymore, and haven’t for weeks just to get rid of old habits that aren’t available anymore.
For an effective IronMan, you should be looking for every opportunity to whore out air smart bombs, and use your normals to beat people into submission. Unibeam H does great chip damage, and have the quickest recovery on block (10f), but M.unibeam does almost as much while being only 1 frame slower on recovery, but 5 faster on startup (23f vs 28f). Repulsor blast --> spread…simply awesome! It hits on all sides, and is pretty safe. Repulsor blast also starts up faster than Unibeam, and it has huge range on the higher versions…so you can catch assists too, and using it just after calling an assist makes that call pretty much free of charge…and if they have to block the assist you’ll recover fast enough to throw more plasma their way to chip them.
Repulsor also keeps you safe from triangle jumps, and dive kicks as long as you do it early. It’ll last a good amount of time, and they can’t get through w/o taking a hit, if they block you can then do spread to make yourself safe and gain space all over again.
Then you have flight…which is the fastest one in the game (and it’s even FASTER in Ultimate O___O ) making it even more amazing! With this you have overheads all day long, and from a long range since you’re ‘in the air’ now gaining access to all his long air normals. Once you get the execution for them, he has totally ridiculous combos using flight as well. Did I mention that you can use it to extend air zoning/chip. Throw 2 air smart bombs, cancel into flight, throw 2 more smart bombs, do a falling air attack…that’s just a crude idea of some of the possibilities. Add in his air dash to air smart bombs, and the fact that you can call an assist while covering them with air H, air d.H, or air S…this guy is a monster!
He’s a TON better than most people realize, but he like Cap (and Spencer) take work and execution to get the fruits of your labor, thus he’s not played by many unless he’s just an assist/damage sponge.
Deadpool…I don’t have a ton of knowledge with him, however I don’t really need to in order to help you with your biggest problem. Be childish…throw stuff! 
You REALLY need to stop trying standing guns in to teleport/dash overhead as your primary offense. He was designed to royally piss people off, from being pelted with his various projectiles. Jump back grenades, jump M guns (the horizontal one is M I believe), standing guns, anti air guns…all of those need to be used HEAVILY. He’s one of the best people in the game to kill people w/o every actually cleanly hitting them once.
In general, you need to learn to be patient a bit more with your fighting instead of always trying to get in there for a combo. You don’t have to sit back all day, but you need to look for your openings that you’re creating with your shield slashes, and other projectiles/assists. Noloader doesn’t do much in the way of jumping so it’s pretty simple to know all 3 spots where you can attack at all times (left, right, just above your head). Once he advances to doing jumping guns & teleports he would crush you right now (hope he’s not reading lol), so you have to be ready with the counter to that in IronMan + Deadpool.
It’s not the worst thing in the world to call a unibeam, and NOT do anything but watch how he reacts. You can’t get a punish all the time if you’re always in recovery of another move. It’s also a lot harder to give out birthday presents if one of your guys is blocking/waiting to counter.
I’ve got more to write, but I’m CRAZY hungry right now lol. We’ll pick this up later.
Kei
OH! I will end you if I see another dropped combo in the same jump u.H xx L.shield slash mistake. You can basically guarantee the combo by adding an air M before the u.H you always do. That will adjust their height so that the shield will be far more likely to hit anyone. You could also just do an air d.H xx L.shield slash instead as long as the character isn’t too close to the ground (small people usually…none of which he plays)
So the final part of your combo should be as follows… jump M, u.H xx L.shield slash, land, L.charging star, etc… or jump M, d.H xx L.shield slash, land, L.charging star, etc.
