@Romes Here is what I would personally start on. I will be going in terms of priority in each elements rarity. It is gonna be a bit of an essay so grab some coffee and a bagel.
Victor *Reason being because being very fast he can keep up a +30% defense and that can vastly increase survivability.
Proteus *Reason being is he is almost maxed and also he has one of the most valuable skills available.
Sabina *You are gonna want to have another healer debuffer available for when you cannot take someone like Melendor into a titan fight.
Gafar *Reason being the health reduction is invaluable when going against healer heavy teams. Especially in field aid wars and he is one of the very few offensive hitting clerics.
This is a no brainer. Gill-Ra. I have her at +20 going the defense and hp route. And boy she is a tanky girl. I have no regrets embleming her as she is only one of two 3 star cleansers. Other being Roman Tyrum.
Well seeing as you only have one choice here, Neith. She is a Jane of all trades as she has mana cut, direct damage, and blinding. She is useful if you need all three but cannot stack the holy heroes. At 3-70 she can still be good in most areas of the game.
Wu Kong *He is almost maxed so you might as well finish him up.
Li Xiu *She is a fairly tanky mana cutter and even more valuable in her outfit because she becomes rogue. And rogues do not have many if any mana cutters. Granted it is only 10% but even with her at 20% it still only buys you a turn or two to set up no matter which one you use. And she hits everyone on the field.
Chao *Reason being he is the highest single target instant mana cutter that doesn’t need the enemy’s mana bar to be full (looking at you two Hansel and Gretel!). Also he has the ranger tree so he gets the pierce ability which is very useful for defense buffs and Ripostes. He already gets choke defense for a ranger so if you emblem him, go down the attack hp route.
Melia *She is a flipping beast when combined with Brienne! Her special’s damage isn’t really anything to write home about but you really just want the increased critical in all honesty. The increased crit combined with the Berserker’s fury is just a sight to behold! I use that combo in any challenge event that doesn’t reflect holy or nature. Bottom line, max her and emblem her to +15 then if you are gonna use her a lot then take her to +20.
Kailani *Utilizing her with Brienne or BK in a titan or Boss fight is really good because the shared damage would beef up everybody’s fury buff. I would say this goes a lot smoother with Brienne than BK because of BK’s taunt mechanic. She is also good to have for buff booster tourneys.
Gan Ju *He and Azar are the only single target mana cutters in the 3 star rarity. So it is good to have at least one of him and Azar maxed for all 3 star related activites.
Boril *Good riposte hero to have for high difficulty content on the PvE side. Also he is nearly maxed so max him and emblem him a bit if you want.
Kiril *As I have recommended many times in the past to other players. To encapsulate Kiril would be saying he is a Dragon Banner with heals. He is one of the very few healers alongside Rigard that will see high level play on the PvP side. I am very much anticipating his costume.
Sonya *A good tanky blue dispeller to have and her costume turns her into a attacking team cleanser so if you get her costume in December’s costume quest, then you should level up a dupe if you get one that way you can use both vanilla and costume. I have her maxed on my main and tend to stack her with Grimm when I need two blues on my team.
As for Karil, just feed his bacon to Boril. He could use the food.
Gaderius *He is almost maxed so just mop him up. He is good to have for buff booster tourneys where nature is allowed and even better if fire is banned.
Caedmon *Sonya’s equivalent on the nature side except he has companion as his talent. I am wondering if he will be in the next batch of new costumes to be released. His speed being fast and having a good area to ghost tiles means he can keep spitting that dispel very often.
Little John *I flipping love this guy!! He is the one that kept my defense a couple tourneys back in the A rank range. It was when it was 4 star very fast I believe. Anyway, the slow speed might turn you off but he does have high tile damage for a nature hero. Put a mana troop on him and he’ll be set.
Skittleskull (aka Skittles) *She is good to have for the class quests as iirc she is the only attack down for sorcerers. She can neuter the field if she goes off. If you have her outfit, again, useful for class quests.
Mnesseus *A good green dispeller to have for 3 star activities. He is a cleric so take him on the class quests as clerics have very few hitters. I took one on my main to +20 going full attack. Alt number one has one at +15.
Brienne *Ah, my main girl Brienne. I take her almost everywhere on my main because she is my only attack booster on that profile. And she works very well against Titans with the spirit link and Berserker’s Fury strat. I use her with green titans and blue titans. My alliance is very casual so the highest titan we have faced is 7 stars.
Berden *He was my sole green sniper for the longest time until I got Mnesseus and Kingston. He is very reliable in all 3 star activites. He is a mini Lianna with attack down.
Get Elena to 3-70 if you lack rings. Other wise max her. She would have been well worth the 5 stars and slow speed if she covered the entire team in riposte buffs imho.
Start with Colen then Sumi, then Scarlett. Colen because he is nearly maxed. Sumi because he is a cheaper and way better version of Obakan. Scarlett because of her main target and neighbors attack down special and her high tile damage.
I personally would just keep Azar out of your two 3 star reds. If you had Namahage then I would say keep him too.