A  Dragon  Team  you  could  use  could  be:

Old  Hermit  Jorge  ---->  TM  Fill  +  Inc.  ATK

Stag  Knight   --------->  AOE  Def  Down

Royal  Guard  --------->  AOE  Nuke

Thesnail  ------------->  Heal  +  Inc.  DEF

Frozen  Banshee  ----->  Poison

I  like  Old  Hermit  Jorge  over  Scyl  the  Drakes  because  he  can  make  your  team  move  faster  and  increase  the  damage  your  team  does.

The  Dragon  &  The  Waves  Leading  up  to  the  Dragon  are  less  forgiving  in  that  particular Dungeon.

Scyl  The  Drakes  is  Great  hero.

I  just  think  you  would  be  better  off  using  the  Old  Hermit.

You  can  use  Scyl  in  one  of  the  other  Dungeons.

In  addition,  You  might  want  to  level  up  a  Warmaiden  or  Alexsander  to  replace  Stag  Knight.

Stag  Knight  is  Spirit  Affinity  and  Dragon  20  is  Magic  so  he  might  do  weak  hits  there.

Who  ever  you  chose  to  be  your  Def  Down  hero.

My  Recommended is  to  put  them  in  Stun  Gear.

Furthermore,  Your  Royal  Guard  build  is  not  good.

You  want  to  focus  on  getting  100%  C.Rate  +  All  The  C.Damage  you  can  muster.

I  would  recommend putting  Thenasil  in  Shield  set.

I  would  recommend putting  Frozen  Banshee  in  Lifesteal  Set.

Lastly,  The  builds  for  your  Ninja  &  Scyl  are  both  wrong  as  well.

You  need  at  least  200  ACC  for  Dungeon  20  Content.

Multiply  the  Stage  your  on  times  10  to  get  the  amount  of  ACC  you  need.

So  if  your  planning  to  farm  Dragon  Stage  20.

It  is  20  times  10  =  200  ACC.

Otherwise,  your  debuffs  will  most  likely  get  resisted.

thank you very much, that's why I couldn't do anything else, it means that I did everything I built wrong, thank you once again I will immediately change everything I can, increase the game 

1  thing  I  want  to  add  is  don't  be  to  hard  on  yourself.

Yes,  you  built  a  couple champions  wrong.

However,  The  mistakes  you  made  can  be  fixed.

The  gear  you  level  up  can  still  be  useful  on  other  heroes.

The  heroes  you  level  up  can  still  be  useful  in  other  dungeons or  area's  of  the  game.

And  Your  Welcome

Merry  Christmas!

thanks again, i will try my best to make the heroes able to move at least to lvl 20 in all the dungeons 

Happy Holidays and a Merry Christmas 

Now that's the holiday spirit.  Merry Xmas! (see harby, I can post without being mean)