First, please don't use card tags within deck tags as you don't need them. And add in a number at the beginning as without that is why your lists look wonky. Not sure about anyone else, but it makes it really tough to follow along with what is in your lists:
As to your questions, you can look
here for my Primer as well as
here for Cryogen's thread. Our lists are quite a bit different but both could offer some ideas on where to take your list.
I will try to offer some thoughts on what I see within your first list (I can try to find time for your second list later, but I assume most things will apply to both anyway):
Lands
I think that even though you are running green to help your mana fixing, lands that produce colorless mana, or none at all, should be kept to a minimum. Specifically, Maze of Ith, Krosan Verge (I realize it is a fetch, but it is slow), Grim Backwoods, and Field of Ruin are the ones I see in your deck. Field isn't bad but I would get rid of Maze of Ith. Green has access to plenty of fog effects and
Spike Weaver and
Constant Mists are far better I think. I don't really like Backwoods due to the cost to activate it. Erebos is probably better if you really need the card draw. And there are plenty of other options as well.
Creatures
Solemn is too slow for this deck. Green has a plethora of ramp options at 2 and 3 mana and I don't think the card draw is worth it. Karametra is another, though your creature count is higher than mine. I think she can make it in based on your overall strategy. If you plan on just spamming creatures, she is probably fine, but I am not entirely convinced she is really needed.
Angel of Despair is rock solid, so I don't want to get too far away from it, but I never liked the 8 CMC. If you find yourself with enough mana to consistently cast it (which Karametra no doubt helps with) keep it in. But I might look to something to lower your curve if you find it sitting in your hand too long.
Ayli should almost definitely be Viscera Seer or Yawgmoth. Unless your intent with her is the life gain primarily. But, as a strict sac outlet, which I tend to look at, there are better options that don't cost mana.
Teysa seems out of place in this deck, but your experience with her may say otherwise. I could never find her to really do what I wanted her to do even in my Teysa Karlov deck and I think Karador is even further away from working well.
Spore Frog is good in a Meren deck (and I see you have Meren) but I would easily go with Spike Weaver over it since Weaver covers you the entire turn cycle rather than one turn.
Sepulchral Primordial is a high cost for an inconsistent reward.
Chainer, Dementia Master is likely better here. Puppeteer Clique is kind of the same. Since both of these can only get opponents' stuff, and the Clique only gives it to you for a turn, I think there are better options.
Luminate Primordial is another on the higher side of things and I think cheap spot removal is just better. While I know it gets rid of your own stuff,
False Prophet has been nothing short of amazing in my games.
Eldrazi Displacer seems decent..ish, but you only have 5 lands that produce colorless mana (and I also suggested cutting 2 of them so there is that) so I feel that it may come up often enough where you don't have the mana to activate it.
As a side note, you put Wrath of God in the creatures section
Noncreatures
I don't know why, but I don't really like Skullclamp here. You don't have a lot of things to clamp and even the tokens from Avenger will grow too large easily enough. I understand you have sac outlets to sac your creatures, but I would probably look at this as being something else. Erebos was mentioned,
Momentous Fall is good.
I don't really have an opinion on the rest though your spot removal seems low (it seems like you could get blown out by a
Torpor Orb or
Humility pretty easily). You have a fair number of wraths so I might suggest cutting Decree of pain to add in more utility spot removal like
Unexpectedly Absent,
Beast Within,
Generous Gift, etc.
I know this is more about what to cut but I figured I would start there.
Oh, and my favorite card in my deck is
Diamond Valley. I realize it goes against the "don't run lands that don't produce mana" but it has been a life saver so many times in my games. With
Crop Rotation and
Ulvenwald Hydra to get it out, I can get it with some consistency.
