With "rival a Makuta in raw power" I meant a fight one on one with no special advantages on either side.
Of course the fighting skills of the Makuta differ from individual to individual and the power they can unleash is to some extend linked to their physical form (Teridax as Dume for example was weaker than after he absorbed Nidhiki, Krekka and Nivawk)
So, in raw power I don't think Axonn or Brutaka would stand much of a chance, but of course Brutaka's Olmak grants him quite an advantage. SInce Brutaka is now half Makuta, that might cause some changes, though...
Tuyet with the Nui Stone was able to potentially unleash more raw power - but only with enough Toa nearby to charge it.
About to of Light, Iron or Magnetism - I don't hink they would be able to kill a Makuta on their own with the Makuta's full attention on them. Only Toa of Light would be able to kill a Makuta on their own anyway. Toa of Iron and Magnetism could only destroy the Makuta's armor - also since Makuta have magnetic powers, too, I imagine that they could counteract another beings magnetic powers to some extend.
As to Tren Krom - that he controlled the Matoran Universe prior to Mata Nui doesn't make him especially powerful, it only granted him immense knowledge about the Matoran Universe (which he most of the time couldn't really use to his advantage on his island, though).
But well, what was Carapar supposed to do to protect himself?
A Makuta could have teleported away, make the attack simply pass through by becoming intangible - maybe a Makuta even could have countered the attack with a disintegration beem of his own.
It's really a shame that we never got a proper battle between Makuta in the canon story - that would likely have given a nice explanation of what Makuta could do, how quick their reflexes where and how well their defenses.
Basically all I say about the dimensions of their powers has to be speculation based on how many different powers they have...