What team composition are you using?

I heve 46,000 power team and i lose evry battle. How i do the qwest to get 50 silver?? 

Get stronger, Farm better gear, level it up, rank up and ascend champs.

I do all this. All artifact level 16, all heroes level 50 5 ascended

Keal shaman gelak fenix

What kind of artifacts you have? Galek with full ATK gear performs worse compared to the same equipped with life steal. What's individual power of every champ? Do you have enough heal? Enough sustain? Enough speed? Do you always come first on the arena? 

Shaman is a poop. "Fenix" - I guess you mean "Fenax" from sacred order - he's good, you just need enough ATK and speed for him to place all the debuffs and wreck the enemy.

46K total for a team with no dedicated support (I don't count Shaman as support as there's no heal) means you have 4 attackers with 12K power average. You need to aim for at least 15K per champ. Either increase speed (from aura, gear or buffs) or defense.