Why don't the Magog use ranged weapons, or at least equip themselves with basic armor?
Since they have space ships, it's not due to lack of technology. In fact, in the episode Its Hour Come ‘Round at Last, one Magog who identifies himself as Bloodmist is decked out in armor and a weapon, yet all of his "soldiers" are naked and weaponless, and as a result, get "plowed down en masse" when advancing towards the Andromeda crew armed with ranged weapons.
One would assume that a Magog attacking party (as opposed to parties that just scavenge already attacked settlements) would at least be equipped enough to handle carrying out their attack.