Multi target missiles I think he means yeah.
I prefer the lock-on warheads tbh, the multi target missiles are good, but it's a pain in the ass when they dash around a corner and you lose the lock. Each missile locks on individually, so if you've locked on 8 missiles and they dash around a corner or a friendly titan runs in front of you, you lose the lock of all of the missiles and you've wasted precious seconds which you then have to try and start locking on again.
I guess that's the draw back to using them. If you're in an open space they're excellent, but how often is there no cover around to use them to their full extent?
I like how every thing has it's place though, there's no best ordinance weapon for titans, it's all down to your preference.