User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-50.80.96.33-20130222215852

reaper advantages

indoctrination fields fast ftl drives collector slaves and heretic geth allies the ability to adapt tech (if its better than theirs) numbers range in the millions possibly more when adding in their allies and slaves. they have the power to destroy entire star systems. their soldiers are made from dead or living organics they can make viruses that destroy entire species (Ex: adjundants) their weapons have an ungodly firing rate near instantaneous adaption to any combat situation they don't show mercy they can annihilate any species once they've analyzed a species tactics and doctrine they understand organic minds and know their limitations many other advantages but to many to list

disadvantages

when a reaper is killed its a devestating loss for them its could take decades if not centrys tto make and replace when hibernating they are exposed when landing reapers must cut their shield in half tech can be adapted as fast as its is aquired overconfidence do to near limitless victories in past cycles if connected to an avatar (Ex: sovereign controlling sarens corpse) when its killed they suffer a viral feedback that kills their weapons and shields their are currently no known reapers that suffer from this design flaw if the species that is being harvested can be processed they must either repurpose said species or eradicate them there are other cons but i don't remember them