Militarized wrote...
Javik states it was his Empires policy to fight a geurrila warfare fight though, fighting them through attrition. This plays to the Reapers advantage...which I outline in my thread that you can click in my signature.
Guerrilla warfare and attritive warfare don't mean the same thing. All warfare is fundamentally attritive; you want to kill more of the enemy, proportionately, than the enemy can kill of your own forces. Specific tactics or strategies or policies can act as force multipliers for this attritive force, but they do not redefine how war works.
Guerrilla warfare, is the extreme antithesis of the traditional force-on-force engagement. The guerrilla fighters break up their available forces into disparate groups and conceal themselves among the mass of the population, relying on ambushes and similar devices to make life uncomfortable for an occupying force that is forced to spread itself thin to control a given area. Since the Reapers ignore the civilian-military distinction and cannot be made "uncomfortable", such a policy would be worse than useless against them. Anderson, for instance, seems to be very clearly in command of organized regular military forces, not some sort of guerrilla group: several battalions take place in the assault on London, a relatively small-scale operation by modern standards but more than sufficient to render a "guerrilla" description false.
From the very fragmentary comments Javik makes, there is nothing to suggest that the Prothean military, such as it was, followed a program of asymmetric warfare against the Reapers either. He immediately follows his "attrition" description with a clarifier: "Whole worlds were sacrificed just to slow the Reapers down." That doesn't fit guerrilla warfare at all. Actually, it doesn't really indicate much of anything about the Prothean policy, just that they chose to pursue a rather extreme method of concentration of force. Which is odd, since Javik also states that there was no final battle in his cycle, meaning that whole worlds were sacrificed and the Prothean military's resources were husbanded to no apparent ultimate purpose.