I can see both sides here, the single fighter getting through and taking out the big bad makes for a good story or cinematic moment, but isn't a good idea for something like SM.
Instead of 50x 200 block fighters, have you thought about 50x 2000 block fighters, or 50x 20,000 block fighters? In some of the harder military sci-fi I've read, the ships they used as fighters are a lot closer to what we would think of as small corvettes.
I have not tested this, and my computer would not be happy if I did, but I'm willing to bet 50x 20,000 block fighters (so 1 million blocks, or the equivalent of an 100K mass ship, which is where I start thinking of something as a battleship/small titan) are going to tear apart a titan with 3 Million blocks. Especially if the fighters have a nice alpha strike weapon and even a single AMS turret each.
On smaller scale test, I've noticed that groups of a dozen or so heavy fighters/corvettes with a decent 1.5 plus M/T Ratio, and 2-3 AMS turrets are exceptionally difficult for my larger escort-themed ships to take out quickly.
I've even done some limited, limited because the AI can only do so much, combined arms tests where I spawn in one or two 12K mass frigates with high penetration low ROF Cannon-Pulse-Punch main weapons and a handful of 4.5K mass torpedo corvettes (Missile-Pulse Main Weapons) to test against a larger ship I'm piloting. I tend to lose in the larger ship when the fleet I spawn in gets close to or above a 50% total block count advantage.
And I should mention those smaller ships are my fleet design entry and hardly a super efficient design. The object when I built them was to make them interesting to for a new player explore for a few minutes or encounter when wandering about.
I'm anticipating that if I go back to refit them into more PVP oriented configurations and add some dedicated anti-shield weapons, the AI will only need roughly 75% of the larger ships TBC to decisively crush an unescorted larger ship, and that number is going to get even lower if you have intelligent humans piloting them with a little coordination and teamspeak.
I don't know if the Meta has fully changed to account for the new Aux Power blocks, but up until the last update my understanding was that unescorted larger ships ALWAYS lost to a well designed and coordinated group of 200,000-250,000 block destroyer type ships. I'd guess with a bit of experimentation, and maybe a mix of different fighters with different weapon groups and a higher block count per ship, you could pull off the fighter tactic you're talking about.
Actually. I'm a build server and a survival server almost every weekday night, so if you're interested in doing some testing in person so to speak, send me DM using the conversation feature of the docks