PS4 Resident Evil 5 Mercenaries United solo Prison Excella 150 kills

this 150 kills is s toughie with excella. took me over 2-1/2 weeks of trying. an hour every night. l did it without the nitro freeze rounds.

if mediocre player like me can do it, so can you.

sheva tribal? not sure if i can do it, especially if nitro freeze rounds not abundant.