Any capital with a halfway decent buffer fit can survive a targeted DD. (some no-buffer active rep fits can even do it too). This is fine since titans are already as powerful as they need to be in a large scale fleet fight setting. However when you scale down a titan’s combat role to a small group or even individual pilots, it feels very underwhelming to risk (risk as in, if you get tackled you die) such an expensive asset only to slash off half of a capital’s hp.
So, why not throw a bone to the little guy? Polarized doomsday - 4 million damage, 0% resists. Only a full-on bait tank cap would be able to survive this and no amount of FAXs would be able to save a titan with no resists should it get caught and counter-dropped.