Star Trek ships. To begin with their only scientifically feasible aspects, they are churning out power on the level of a gram of anti-matter a second at the LOWEST. That is their simple, ye olde constitution "totally not a warship" and it only gets more insanely powerful and world wrecking from there.
Then add to that the ships full capabilities of entirely imaginary energy and physics breaking functions and standard fighting speed of warp flight, and you have entire fleets of untouchable world destroyers.>durr hurr but two ships with shields up still collide with each other.
Yes, yes two shields capable of stopping world wrecking energy interfere with each other when they collide, why is this surprising? That's like being surprised two steel cars wreck into each other and then calling steel "weak" because the cars broke.
If your ship is not a planet killer, it's weapons are not comparable to Star Trek weapons. If your ship cannot fight at faster than light speeds, where a five minute battle can begin in one solar system and end in another solar system, then you will never touch a Star Trek ship.
So Naturally, the TARDIS has already won all fights ever. Deal with it.