Instantance brutal (use militia to farm)(and only do if can in less than 1 min)
CB normal -hard
Dung i can pass 15(aprox) but i dont do it because take more than 3 min.
Pvp silver (have 61k and sometimes i can defeat up to 110k) i use militia there
You should be farming with your athel. It would help to have ~200 speed and 100% crit rate. Stop using sister militia for anything.
No clue what kind of cb team you are trying but you will need a complete new set of 60s to form a team for it.
Dungeons I'm amazed if you can clear 15 like you say as again you have no team with your current roster to even pass level 10 spider.
Pvp you can almost put together a team. I would suggest high khautun in lead spot, spirit host, warmaiden, and your athel. Again though you are lacking any kind of speed gear, farming brutal 6-6 or 8-6 for boots with speed main stat is probably a good idea for you right now.
You should be farming dragon stage 13+ for your account right now. You should learn how to properly gear you champions. You should work on leveling roles to help your account : aoe decrease defense champion(warmaiden), attack down champion(coffin smasher), support champion(scyl), damage (ninja), posions (kael) from your current roster. Stop ascending all these random green and blue champions no idea what your thought process is in doing this. Stop investing in bad champions.
You can chose to play the game anyway you want but if you want to succeed I would suggest changing your play style and methods. There are plenty of YouTubers to watch, and these forums can be helpful as well. But if you just ignore any and all advice and stick your head in the sand claiming you are right and everyone else is wrong you will never progress.