Call me ridiculous, then!
Technically Wolverine has no "solo" mix up either.
Instant overhead requires an obscene tall character like Sentinel or requires an assist to help confirm it or a fuzzy set up or x factor... all of which are about the same as the requirement for instant overhead with Firebrand (you need an assist, meter, obscene tall character or x factor).
Berserker Slash requires meter/x factor or assist to get anything out of. Without those factors it's a high risk low reward solo mix up tool.
So this whole business of "character has no solo mix up" is kinda dumb to be honest especially when said character is played as a point. Firebrand is by no means on the same level as Chris who has nothing to open you up with even when he has you locked down and has assists. If you get locked down by Firebrand you are getting opened up... period.
Berserker Slash is better than anything Firebrand has for solo mix-ups. Firebrand has nothing unless the opponent is pinned.
Also, solo mix-ups are really important as a feature. It's a huge part of why Zero is such a terror.
I was talking about whiff punishment. As in Firebrand does Bon Voyage mid screen but because of the angle of Buster it makes it really easy to snipe Firebrand out of it as Zero.
Not to mention that Zero can fill the screen with Lightning bolt that make it really hard for FB to move around properly without getting hit by those lasers.
Who does Firebrand loses to? Genuine question for my knowledge. I expect Firebrand to lose in these match ups:
Morrigan - Everyone knows this
Magneto - It's close but I slightly favor Magneto. Well placed EMDs give FB trouble, Shockwave can disrupt his approaches and Mag Blasts are generally better at occupying space than FB's fireballs.
Dorm (if set up) - Not sure how Firebrand does if Dormammu is properly set up, I don't think he does quite well. But if the opposite is true and Firebrand is on Dorm then I feel this is really hard for Dorm.
Zero - Buster destroys Bon Voyage angle of approach. Lightning cutting the screen in half gives him issue. Zero out ranges FB at any range further than jab range.
Vergil - Better priority at any range further than jab range. I don't think it's completely free for Vergil, Firebrand can definitely whiff punish his normals really easily with Bon Voyage. Helm Breaker cuts down his approaches pretty hard I would imagine.
Shockwave actually isn't great at disrupting Firebrand just because his air dashes are command dashes, and they don't last long. I've had a lot of people try and punish my command dashes with hypers and I still (somehow) get to block in time. The matchup is definitely in Magneto's favor, though, just because he has so many more options. I would say 5.5-4.5, though. It's a stressful matchup, but I never feel overwhelmed.
Dormammu is tough because he can cut off Bon Voyage. I never fear Firebrand when I play Dormammu.
Zero is bad.
Vergil isn't scary at all. Helm Breaker has to be done pre-emptively against Bon Voyage, so Vergil players just kind of have to hope to catch it randomly. Plus he's almost never on point, so he gets unblockable'd anyway!
Hawkeye is very frustrating. j.H locks out Bon Voyage, and the arrows do the rest. A lengthy projectile war is the way to go here, and usually it ends up with me DHCing Firebrand out once I get to two bars for a Chaotic Flame punish, and then beating Hawkeye with Dormammu + Mystic Ray mix-ups.
Wolverine is pretty tough because his normals are huge and his pressure is better than Firebrand's. The best thing for Wolverine to do is to just turtle while calling Plasma Beam and then hit confirming off of it. It's a pretty annoying matchup that forces both sides to play it slow.
Nova's moronic air range has led to some stupid stuff.
Dr. Strange is frustrating because he can keep Firebrand out and Firebrand can't pressure and mix-up like Wolverine can, so getting in isn't necessarily the end.
MODOK and Wright can both cause trouble because of their shields. Firebrand doesn't have an easy way to side swap and get behind them. Generally I play it slow and wait for careless play. Against Wright I bring in Dormammu, though.
Haggar can Double Lariat Bon Voyage. You have to play it super slow against him and bait things out or go for lots of lows once you get in.
Dante and Vergil can both sometimes anti-air Firebrand just by mashing random sword normals. Annoying.
These are the only characters that cause any hesitation for me when I play. Of these, I would say the following are truly troublesome:
Magneto
Haggar
Wolverine
Hawkeye
Morrigan
Everything else loses to Firebrand at the start of the round gamble, which helps a lot with the matchup problems.
As far as my mains go, I would argue Strider wins between the two, though it's not by a huge margin. Between his normals, Formation B safety and pressure, teleports, fast ground movement, and Formation C being in the prime spot for all of Firebrand's approaches makes it difficult for him to deal with Strider - be it on defense or offense. Admittedly, I'm thinking with him on point, and with a team like mine (Strider/Strange/Dante),so depending on the assists it might go more in Firebrand's favor. I don't really have a whole lot of good Firebrand experience with Strider on point, but I've played a few with him on point, and it feels in his favor.
Dante has all the tools necessary to fight Firebrand even solo, but he has to be extremely careful since everything is slow to startup. If you mistime something with Dante, you're probably going to eat a Bon Voyage. Dante/Vajra is extremely efficient against Firebrand, though.
Trish is more or less even against him, imo. Neither one has a clear edge, but I would say that Trish has an easier time as she can make it harder for Firebrand to come to her than vice-versa.
As far as "solo mixups" go, Strider sorta has solo mixups. Dash in low or dash in double-jump instant overhead j.H(that can crossup) and is an OS airthrow. You can upback it, sure, but he can do it when you wouldn't expect. Been practicing so I can do it consistently. Other than that, I can't think of any "solo mixups" that don't require something else to get the benefit.
I don't feel compelled to go after Trish. Firebrand has a superior ranged game since he can shoot aerial horizontal fireballs and she just has crappy Sparda.
Strider has the better neutral, but he has to hit me several times to kill Firebrand, while I only have to hit him once to kill the whole team. So he doesn't really bother me too much. Mucho respect for anyone who brings Strider out on point in this game.
Dante is pretty even, but Dante/Strider is a pain.