Im in the same position with different characters so take with a grain of salt. Looking at just their abilities on paper you have a good arena team and cb/ dragon team but theyre different and almost starkly contrasted like 1 or 2 big guys in one are not great for the other.
So the big names ive heard thrown about and/ or looked up. Rector, spider, apoth, war maiden, frozen banshee.
wytherer looks great all around. Leech i think is lifesteal for everybody, also has healing and buff management. Def a legendary healer. Probably makes apothacary obsolete.
gisleah ive geard talk about maybe just a recent fusion event. Looks lackluster. Good for arena but wont be freezing any bosses or dragons. Blocks debuffs though so may use on dragon just for that.
epics rector and spider. Rector i hear talk about. good and im scared of them in arena. Another good healer but you got a legendary one and the rest of us got apoth so youre good there.
spider, looks good. A standard atk and def debuffer same as warmaiden but epic-er.
apoth and war maiden youve got better of unless you prefer a rare easier to book cheaper version of them. Spirit host is your speed up person i think. Thats where i got my early lego for. If you need that. Shes not great at it, looks like.
frozen banshee ive geard talk of, dont have one myself. Looks like a ok poisoner, more poson booster. They have to be under her debuff and hit by her. ive got urtica whos similar but lets anyone appky poison under her debuff and also has poison sensitivity so may poison well tigether but idk if multiple poison people takes too many battle slots. Ive intended to pair her with someone and having to put poison gear on a poisoner seems like you shouldnt have to.
spider seems like your next atk person after??? You need a main atacker then maybe spider. Idk if he can be it. Wheres your main champ or did you ditch Galek? Kael or athel are basic nukers, damage dealers. I didnt look at all of your list.
or try frozen and be a esrly poison team but need a fast farmer more immediately. If gisleah hits hard maybe can be a main atk.
gisleah if she hits hard even if not ideal for cb or dragon then spider, wytherer, and can try out your 4th spot with speed from spirithost, poison, another main attack or revive if wytherer is only heals, rector if revive is her thing but sonetimes you want more atk.