Mulasem is a second form with one of the most complete movesets and the lower damage doesn’t even make much difference. I think it’s probably the one which is the strongest compared to its final form. Polaboss is probably a better choice for power level though.
Mojinator 2nd form is a weird one because it has extra uses compared to the final form and tbh is pretty much better when it comes to PvP, especially because of the lower cost.
Elem accelerate is a key part of Nauticruiser’s moveset. Not having that is big. Also, tracking makes laser blast far better. I know what you’re saying, but not having the accelerated call supply makes the second form a far lesser threat.