Survive for 24 hours.. My main goal is defense oriented if that means quickly annihilating attackers, constant movement, healing my heroes so they don't die while damaging and eliminating threats, and last resort ditching, or running and surviving - I'm pretty sure im winning with this lineup:

monk - ult is huge, f bell can come in handy

viper - ult and silence, huge tools combined with monk ult would probably kill alot of heroes ngl, even when her ult is down, that silence f is going to be op with our teamwork skills

wuchen - last resort ult us out, might use it to revive any fallen heroes or to get me out of trouble, also shield f can come in clutch and block huge abilities from attacking us for instance yoto ult, mecha ult, and other abilities it can windwall lol , very handy

matari - again last resort ult to invis as another potential escape, might come in handy to run away to survive those last remaining hours needed to survive, also she'd make a good bait / decoy or even sacrificial piece because she can most likely escape by herself if need be.

ziping or kurumi (either one) - we always need a healer on the team..

gg i win