[PsychoTechFreak]

1. Don't get Hurt
2. Ram

It is just a guess but maybe the kamikaze strategy just works if you load at least one warhead ?

Now, to something different:
Has anybody checked out the "until all weapons gone" button ? In many of my simulations, my fleets have done a better job with this button checked. First they knock out the weapons and then they sweep the battlefield from the wracks.