Board Thread:Questions and Answers/@comment-108.11.253.92-20150522022500/@comment-35353971-20180918205427

Easiest to hardest:

Cat is the easiest. All you need are meatshields, Dragon, Bahamut and some amateur strategy.

Cow is probably next. Spammable area attackers are the key here. You may need Ururun, but not everyone does.

Tank is third easiest. Like Cat, it’s meatshields, Dragon and Bahamut, although this one is harder to pull off and takes longer.

Since the addition of Cyborg, Fish is probably next. All you need is meatshields, Bahamht, Ururun, Cyborg and some sort of decent critter (Even Space Cat can work if you have enough time).

Gross is next, although if you have Octopus or any form of wave blocker it is by far the easiest.

Bird is where it starts to get hard. The bird level takes an extremely long time and requires a consistent, money-loose strategy.

Titan depends on your luck. Unlike Gross, it has enough attack and strong enough support to make Octopus significantly less of use here. It requires a bit of RNG and an ability to work around the inevitable shockwaves.

Lizard is not neccesarily hard per se, but you may need Crazed Titan and maybe a higher level Jamiera. Or you can do what I did - hold it off until after COTC3 and demolish it with A. Bahamut.

Axe is definitely the hardest. It spawns at the start and the boosted shy boys really tear through your defenses. Rich cat is almost required if you aren’t reaaaally good at money management.