Then PvP, against another warrior like Martial Artist or Mighty Majin, i would have an opportunity to win, don't I? because they have to approximate to attack me...

And then, i'll always lose on PvP against a sayan, don't I? And a PvP SK, have any opportunity against a sayan? :S the human has the transformation to help him, and not the namek.

oh sorry, i meant to "spend 1 point in each skill, 2 in total", no 4 points doesn't worth it. and sadly no, you can only use Provoke and the 2 Skills. Sorry for the misstype! gonna fix it haha!
Great Namek in PvP is bad because you can still be stunned and knockdown, and since you are slow, nobody will even try to hit you, will just run away until it ends and you can't do **** about it.