It’s not news that the Toa Mahri had no combo models (Yes, the Manutri, but I mean standalone, sans Barraki). Which is somewhat disappointing, having the six since '07, so I turned them into creatures using only pieces from the set in question, so you don’t need to have all of them to make these.
Kongu has been remade as a venom eel, using the red axles and darts to create teeth (and eyes, simultaneously). The darts also make nice spikes. The gray dominates the body, but the mostly accented green looks nice for natural marbling.
Jaller is remade as a squid, This model does outsource chains from Hewkii, but the idea is to add as many chains and hoses for tentacles as desired. The darts function as suckers.
Hewkii has become a mutated Keras. The arms have somewhat limited articulation with different sized claws, and is the only one of these models to use the mask.
Nuparu is recreated as a stingray, the only one to use the eyestalk piece. Like many of these, the hips are paced where the head would go, with the legs making nice feelers, and the Metru chest rounding the head. The combined shields and feet made good fins, if only they could be larger.
Hahli was made as an arthropod; best of all, the sockets need not be taken apart. The wings pulled off the carapace well enough, and the armor pieces were good for ‘grasshopper’ legs. Unfortunately, that is as far as the head goes up, but the construction of it is unique, using the foot and claw held together with the darts. This also borrows a second hose piece.
Finally, Matoro is done as a mutated Takea, using the torso as its head, and darts for long teeth. The legs and blades are superimposed as a tail, and the feet and armor as fins. Unfortunately, there wasn’t much of a way for making a larger dorsal fin, but maybe it doesn’t need it, using only darts as one.
Disclaimer: I am not accountable for bent Cordak darts as a result of using them as pins.