The odds of getting an impactful kill is low so escape should be job #1.
I vote "Misty step (bonus action) & double move, behind cover/concealment if possible". That should be 90ft, meaning the fighter can't catch you to melee. The rogue loses sneak attack from an ally in combat and if you can force the rogue to move to be able to shoot you, they can't take Steady Aim so you'll survive them. 90ft plus whatever range the cleric & wizard were at eliminates a lot of spells, reducing both casters' options. And if you can get cover, that's at least a bonus to Dex saves even if you are in range of an up-cast fireball.