For COF list,

During early levels, i would recommend Vincent, Hyral, Kane, lilith, eva since u don't have much choice.
So in the mean time, the hero u need to farm is:
Jugo (at least 4*) , can be use as a tanker after purple.
Hyral (pump till 3* first then focus jugo till 5*), become core of your COF damage forever.
Bomo (gain from Arena) Priority as your first hero from arena.
Gabriel (effective starting from lv 70 onwards, so better farm from early)

Vincent can be drop after lv 55-60 and replace with Jugo as a tanker. During lvl 55-60 your COF build should be Jugo, Hyral, Kane, lilith/Bomo (if have), Eva.

Lvl 70 onwards, you should go by Jugo, Hyral, Gabriel, Bomo, Eva till the end of the game.

For current arena build, there are 2 build which is usually used by top rankers:
1) Hyral, Noire, Bomo, Jugo, Leo
2) Barbaro, Noire, Jugo/Bomo, Hyral, Booster.

Cof team can be use in Campaign as well, Gabriel serve as your core hero because his silence can almost gurantee to clear most of the stages without having a single unit to die.

Panda = after purple
Try to farm hydral SS too .

use back the very standard team..

Leo Jugo Bomo Noire Hyral

My Pandor is at level 40 and Barbaro at level 55. Who should I level up first? Both 3 stars. Thanks.

have you max your bomo?

After pandor, usually should suggest to farm drako
Pandor : arena, 1x prophecy pool.
Drako: 2x prophecy pool

It depends on whether you need it or not. Prophecy pool gives items which will be required to upgrade purple +2 and above.
Drako is better wise if you are farming for Barbaro.
Pandor can farm later coz he'll be strong at late game after 4*. If possible, arena coins mainly focus on bomo till 5* first.

umm just started playing few days back, so level 36 now. F2p player and I have 5 basic heroes and drako+oggie.

Every 5 288 gem can get a 3* hero? I think i came upon that somewhere here in the forum.

do 5th 288 for 3* hero.. its guaranteed so why not?

barb, jugo, bomo, noire, hyral

actually both also good..
before this for mid level im using leo,jugo,bomo,lumina,noire..

for prophecy dun have a team..all stage use different hero..
are u vip player?

naomi still useful in dojo female and dojo magic

Heyy same... Level 42 here.. Since there's few of us here maybe in the future we should create a guild