Well, for starters, Cyclops are ranged, but Wyverns are not. :)

And so what? Ranged or not... it doesn't matter; Wyverns will easily defeat them. :)

Added 3 minutes later

I don't know... in my opinion, the stronger the unit, the more expensive the building to produce it...

What don't you know? Are you saying that Cyclops are stronger because their production cost is higher than Wyverns? - THAT'S NONSENSE!!! Just check it out...

With expert ballistics, when defending a castle, towers deal damage from 0.5K to 1.5K (unfortunately, I don't know how it's calculated exactly, but ballistics plays a major role).

Another "stupidity" - what does "towers deal damage from 0.5K to 1.5K" mean? - Read the Physics Guide - there's a lot of useful information on this topic :), you're wrong.

Added 2 minutes later

It's useful, but it doesn't drop often, and there's also a chance that it won't drop at all...

If you have the opportunity to take a second turn due to morale, then there is absolutely no chance that it won't drop. :)

I was asked to announce the entire list, here it is ;) :
(in parentheses - who each unit defeated)
#1(1) Nagas, defeated: (all)
#2(2) Dark Knights, defeated: (3;4;5;6;7;8;9)
#3(3) Champions, defeated: (4;5;6;7;8;9)
#4(4) Ifrits, defeated: (5;6;7;8;9)
#5(5) Psychics, defeated: (6;7;8;9)
#6(6) Unicorns, defeated: (7;8;9)
#7(7) Scorpios, defeated: (8;9)
#8(8) Wyverns, defeated: (9)
#9(9) Cyclops, defeated: (no one)

I wrote how it was calculated earlier.