I'll make a start and go with Chani. 

Chani definitely needs synergy to work effectively, but when you pair her with the right champs (e.g. Frozen Banshee) she becomes a monster. How she scores only 2,5* for CB on hellhades should be considered a crime, since she can basically maintain full poison and HP burn debuffs for the entire battle with her kit. Sure, she needs synergy and lacks sustain, but her damage output is really solid in all areas of the game. Her A2 is one of the hardest single-hitting abilities in my character roster, and she isn't even fully built as a nuker. So yeah, I would say most people are SLEEPING on Chani 🫵🏻

Cool idea for a thread. :)

I'm fairly biased but Rowan would be my pick. One of the few champions that scales on damage on something other than pure attack, hp or defense, and has an A3 capable of filling the bar with poisons. She slots in quite well as a DPS in one of the high speed unkillable comps but can also work just fine as the slow stun target, too. 

Stole mine, I'm a big Rowan fan. Had I not been, I wouldn't have done this speed tune for ya, lolol

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I would have to say Coffin Smasher. He's an excellent rare, making him easy to build, and an HP based champ, meaning his damage scales with his survivability. He has a Dec Atk on his A1, and HP burn, and a passive that reduces AoE Damage. He absolutely shines in Clan Boss, and with those skills, plus his A1 being a multihitter, can help folks grind up through Fire Knight as well.

I used mine in my first UNM Clan Boss team, a Skullcrusher CA with Coffin Smasher and Anax.

Warmaiden

funny, i'd consider her more at home on a list of the most overrated champions

decent comp :)

I agree, she does end up being one of the best 4 or 5* chickens in the game

A great 3 star chicken for sure!

my bad, the heat is eating away at my ability to evaluate champions, please forgive me 😂

The heat is making you play the game like it's still 2019! Don't make any 6 star choices without cooling off, okay?? #worriedaboutyou #dontbookoutsideCvC

I use her as food for my chickens. 

Early game - Preserver. Multipliers on her A1 are insane (2 hits, 5.5*ATK each), but the abysmal base ATK makes her easy to dismiss as a solid damage dealer.....kinda similar to Stag Knight's A1, which is also underrated.

Mid game - Gorlos Hellmaw. Aside from AOE Decrease Defense (4*ATK) that books out to 100%, he's capable of putting out great damage and has an HP burn on his hard hitting A3 (6*ATK). 

I have a few endgame champs, but can't think of underrated ones. Maybe Konstantin, I feel like people sleep on him, but I don't have him fully built, don't have anyone to compare him to, and I'm not in Platinum yet, so can't say I am qualified to say if he's underrated. 

Armiger.   He is one of the best CC in the game.   I underrated him.  I didnt take his skills seriously.  It took too long for me get past his lowly beginning.  

Ok, so i'm the new guy here, so i'm gonna throw in a really really under-rated noob champion. There's 2 of them actually, but i'll go with the uncommon Crusader (if i recall, he's the 3rd or 4th champion you ever get).

He has a double hitter, and a join attack every 2 turns. This is actually a very rare ability, and the epics or legos who have a JA need lots of books to lower the CD, and it never goes down below 3 turns for them..

If you have a full team of triple hitters and you put him in a relentless set, sometimes he can take the whole FK shield down all by himself. Not bad at all for an uncommon!

That would also be an interesting discussion, although that might trigger people 😜

I'm gonna go with Roric. I find he is just spectacular, and so rarely used. 

That is interesting. I heard many conflicting views on him. Some hate him, some love him. :)

Aleksandr. I'm not saying he's good, but he is good at removing the shield of the magic guardian, and the 7x multiplier on his a3 is not something to ignore. He can deal some real damage off that a3 if built with a lot of crit dmg and crit rate

I would definitely say Skimfos the Consumed, or Mother Cybele!