hi im quite new, would like to ask all pro here for advice

what do you think my following line up can do for arena,tower and raid... any advices to change?

Back Velika 34 +5
Delion 30 +5
Ace 30 +5
Eileena 30 +5
Bai long 30 (upcoming for +5)

my team meant for full dmg but i felt like i would like to replace either eileena or bai long to ming2... what do you guys think

i have others heroes to build up if you guys can advice
4&5 stars

wukong
soi
rei
shane
nia
mao shang
ling ling
jin
sieg
yui
ruri