To begin, since you're looking for feedback on all these decks, I'd recommend providing a description for each deck so that we know what your thinking was behind each one. That way we don't have to guess.
5CG - the new wave: This is certainly a pricey one, but I'm not seeing the idea here. If you're looking for a five color, you could go a lot of different ways with it. Progenitus, Door to Nothingness, or any of a wealth of cool multicolor creatures would work here, but again, I'm just not seeing how this deck wins games.
Damage Reflection: Now this is an interesting idea. I like it as I run something somewhat similar in my Squirrel deck aimed at getting the crap knocked out of a creature of your choosing for your benefit (mine generates squirrel tokens, yours does all sorts of damage). One thought would be to include something like Lure to ensure that your creature(s) of choice draw the full ire of all your opponent's critters. Another thing would be to include some means to revive or regenerate your creatures so that when they do get the crap kicked out of them, it doesn't matter (this could mean something as simple as Regenerate). I'd also definitely suggest getting another Darksteel Plate in there as those creatures won't do you any good if they're dead. Lastly, it looks like the mana curve is a bit steep, perhaps some ramping creatures? You could easily drop one of each of the 4x creatures and fit in 4x Birds of Paradise to help accelerate and stabilize the mana base.
Elemental Graveyard: So this is intriguing as I didn't recognize that you could really run an elemental tribal deck. However, I can see where there would be better options than Splinterfright as it doesn't look like you're going to have a lot of creatures in the graveyard. Outside of you using the evoke abilities, you don't have much removal to kill their creatures and I don't imagine your opponent will be working to take out your smaller creatures. Even something as simple as Fire Elemental could be much more effective. But I could be wrong there. I would also likely drop the black as you only really have Tragic Slip and Shriekmaw, which could easily be replaced with some burn spells, Prey Upon, or Beast Within to get the same effect. You just have a splash in there, but I can see where you would be able to focus a bit more on red/green. Also, from the look of things you have a LOT of options for bombs that qualify in RG and fit the Elemental bill. Chlorophant and Avenger of Zendikar are two easy options that I'm seeing. Take a look here and you might find some better fit creatures (http://deckbox.org/games/mtg/cards?f=47
Fs!734.5.6)
I hope those ideas help. Again, whatever input you can offer on the directions for each deck will help us give you meaningful comments. Lastly, try posting one or two decks at a time in a thread, as that will likely increase the feedback you'll receive.