Dmg reduction is actually useless since prime deal dmg in percent(correct me if I'm wrong), your best bet would be regen chip and nadir ring(for regen) and gid gud in math😔 Ps. You can use mix for faster regen rate Ps.2 prime vs armageddon is kinda hard to decide, you can die easily by armageddon's smite if you're not fast enough to get out of the area(+burn if you get hit)but you get a chance to attack arma while they stand still to use smite. Fast armageddon is much scarier than fast catastrophe too, as long as your arma opponent didn't use accel chip with 2 veldus, it would be pretty easy to land the attack on them. You also need good aim and good timing to land prime m1, z, and x on fast target too. So I guess you just have to actually get good on using prime to defeat armageddon.(cuz Im suck at aiming and got my ass beaten by a fast arma while using prime xd)
Use all veldus blessing and switch between dependency and ultrasonic. Numbers 3 and 6 for the walls are best. Do the prime numbers as fast as possible, and you should be fine