Thanks for all the feedback, Zaxvo.
I think the biggest problem with trying to do a team like this is that you run out of parts -- and you touched on this in the comments.
Cilira, the blue one, looks fine from the waist down. Her torso is shaped like a T; thin from the waist up and then suddenly spreading out sharply for the shoulders. It doesn't really look that great, and initially I was going to pass on reviewing Cilira merely because I wasn't sure if I was going to be able to offer any positive feedback. I looked at the others and then came back to Cilira and noticed that you've got an excellent bottom half of a Toa -- the top half was jsut so off I didn't actually notice it. I've tried using the Nuva armor on the legs, like that, before, but it always looked weird to me, so well done there. That's impressive (at least to me).
Also, it feels like you've got to much black/grey and not enough color.
Yeah, Cilira was the last one that I made, so I was running out of parts. Not sure how much the shoulders actually flare out, though. I do like the legs as well, and that's where I started on building Cilira, so thanks for that.
Kerev suffers from similar problems to Cilira, but not as drastic. Here, his torso needs some more armor, it feels "raw" to me. And, he could do with a bit more color as well. The balance of color, in general, seems off to me. lots of black on the bototm, lots of grey in the middle, and lots of black on the top, with green interspersed throughout. I feel like the black and grey should be more evenly mixed, with more green throughout.
And nice head, by the way. It certainly looks like the mask of a ninja.
Kerev wasn't supposed to be very armored- I was focusing around Technic construction. But I see how that can look unappealing. The colors were off, yes. Overall I agree that Kerev needed some work. 
Asgage is wonderful. I especially like what you've done with the sword, it looks amazing. And although he hasn't got much color too him, it's in all the right places so I look at the armor and think, nope, he's colore,d the armor is just covering it up. In other words, the lack of color works fine here.
Thanks again. He was the first of the team I built, so naturally he'd be the best, in terms of originality and usage of available parts.
Madar looks great as well, although here I think there are too many colors. Count them, you've got black, grey, orange, gunmetal, and trans orange. As a general rule of thumb, 3 is a good minimum, maybe 4 if you have too. 5 is almost always too much. I like the use of the rahkshi head in the torso, it looks wonderful. Actually, all of the torso is great; it's compact, flows well, and it works.
Actually, he's only got four main colors- orange and earth orange, with black and dark bley in there as well. (The trans-orange is just for the eyes and heartlight.) I like working with crazy color schemes and making them look good, although Madar wasn't intentionally so... negatively multicolored. Glad you like the torso, anyway. 
Lastly, Ormont. He's my favorite one of the bunch, followed closely by Agage. No issues with color here, the al black approach looks marvelous. The shoulder cannon looks great and it just clicks together. Purely from a moc perspective, I wish he had two eyes...it would look a lot cleaner that way. I'm not going to fault you for it, however, because I can tell you've got solid stories around all of these so it's obvious you've got an artistic reason there.
Yeah, two eyes would be better, but I only had one of those red tiles and found this easier to build... not to mention the story that I'd already planned out, as you mentioned.
Overall, well done. The Ormont, Asgage and Madar are excellent, and then Kerev and Cilira are decent.
One thing though: don't always feel like you absolutely have to go custom for the limbs or torsos. Custom is only impressive if you manage to make it look good, as in the case of Ormont, Asgage, and Madar.
Oh believe me, I know full-on complexity is unnecessary. But I consider it an extra challenge in my MOCing. I am aware that Cilira and to some extent Kerev suffered for that, although the initial intent of this project was to create a completely custom-build Toa team.
Thanks again for all of the feedback, it's always very useful. 