Compared to Armored Core 4, the Nexts are much quicker. The quick boost thruster 
consumption appears to have been reduced and this causes quite a few of the AI 
to move very quickly and very erratically. Tried and true methods that brought 
down Nexts in Armored Core 4 do not always work, such as the ever potent 
HLC02-Sirius. The developers have compensated for this by giving placers the 
back chain guns GAN-01-SS-GC obtained by following the Collarred story line. 
Combined with the INBLUE FCS, which has the highest lock speed, and rapid quick 
boost techniques to stay close, you can easily destroy almost any Next. 
Unfortunately this is not available until after the "Defeat White Glint" and 
"Defend Line Ark" missions, which are very difficult without these chain guns on 
your back. Very few Nexts utilize aerial combat techniques; mainly Fragile, 
White Glint, Ambient, Stasis, Old King, and Unsung. Also, laser blades can use 
lock on now, making it easy for Nexts to target you with their blades. Shinkai 
is the most dangerous and is found in the Defend Arteria Cranium (final mission 
for Collared) and can very quickly take you down to size using homing strikes 
from the 07-Moonlight.