[Gregstrom]

Thinking about it, if the only advantage to Berzerk is the +2 attack, then W9N8F4 is a little more expensive for a better result (no penalty to Defence).

And if 10% regen is an acceptable alternative to 15%, then W9N6F4 gives you rather better scales (or a sleeping rather than imprisoned Pretender, which seems like a good thing for early research).