Help me beat this Neochu

I went with the Death strategy featuring Vanille as leader.

Death has a low chance of doing an instant kill (15%) but this gets higher if you use Vanille's Malboro staff (improved debuf).

This tactic involves luck but is the easiest way. My recommended setup is:

Vanille/Hope/Lightning
Sab/Med/Med <-- start in this one.
Sen/Sen/Sen
Rav/Rav/Com

As mentioned in the post, go to Sentinel only if Screech is used, otherwise stay in the first paradigm and keep casting death manually.

Use the third paradigm to kill the other mobs.

If you want to beat it without using the Death spell, you need to almost constantly have a sentinel present. your other two characters need to switch between MED, RAV and COM roles.

outline of non death strategy:

sazh hope snow 
rav med sen 
sab sab sen 
com com com

equip haste accessories on all members, and physical resistance, and earth resistance on snow since he will be tanking get random: instant chain passive on sazh as well

at the start of the fight spam cold blood over and over until you stagger then debuff and launch neochu and kill in cerberus

This outline should allow you to fill in the details and succeed easily with a non death strat.