Hello everybody! I am currently at level 66, and so far I have these heroes. Please help to choose which heroes should I prioritize for crusade and arena? and possibly for 2-3 teams. thanks!

Wind Master 4* purple +1
Commando 4* purple +1
Leaves Shadow 3* purple +1
Lightning elemental 3* purple +1
Lunar Guardian 3* purple +1
War Chief 3* purple +1
Old Curse 3* purple +1
Bear Warrior 3* purple +1
Chaplain 2* purple +1
Cleric 2* purple
Admiral 2* purple
Lightning master 2* purple

Arcane sapper 2* blue +2
Wandering spearman 3* blue +2
Depths voice 2* blue +2
Emberstar *2 blue+1
Psychopath
Sniper
Ice mage
Shallows keeper
Imperial Executioner
Savage One
Mountain
Succubus
Silencer
Necromancer
Shadow Shaman
Machinist
Mystic
Rifleman

so far I am currently using WC, Commando, Leaves, Lunar and Old Curse for my team.
any ideas or maybe thoughts about what should I replace or any heroes should I try getting at? thanks!