Just finished my first run, and my team was like 35 ish Clerics, the majority. Mixed with Paladins as the 2nd most used unit with near 30+ also. Had like 10-15 Wizards/Vikings/Medic dudes mixed in also.

I died at wave 111, but considering it was my first run. I think it went pretty well. I should have bought more consumable items for the wave 100+ section.

Frankenstiens with Skeledude summoners and it's possible but early game is dicey without clerics

Zombies build

looking at my best runs... I can confidently say yes

https://imgur.com/4MZ7Lgg

Clerics are good, but stacking them or even using them is not mandatory at all.

got to 114, my team was 34 medics, 15 samurai, 55 necro, 3 zombie, 18 viking + all of the on knockout relics (and most of dude special relics)

I got to 119 on my first run ever https://imgur.com/a/C95bfBj

Full undead build, as many of undeads have a healing ability that is unlocked by a relic.

Just got a fun 113 run with 52 Wizards, 1 Ninja, 28 Spartans, 29 Necros, 19 Zombies. No healing, looooots of fireballs.

i have, it was majority knights and then a bunch of ninjas for dps and medics for the heals

5th run i got to round 107 with warlocks, ghosts, medics, frankenstiens and knights.

vampires steal life and share it with Spartans defending and majors telling them to taunt

M first 110+ was a healer-free run. All health steal and regen. Frank, ninja, bone summoner, warlock, and vampire. Ninjas' job was to stay dead and buff the franks.

Clerics are the best healers, and it's not even close.

I broke 100 with vampires + bards, with medics as backup. There were a few spartans thrown in, and a single lone ninja to buff my bards and vamps.

Full undead is really strong, ghosts are insane dps and also double as indirect healers if you have all their items once you have a steady stream of skeletons to kill off

My furthest run so far (118) also had no clerics but only because i was never offered any... spartans really carried that run

But yes clerics are the best healers not even a contest