Also, for anyone having trouble on NORMAL in the EARLY levels (like I was before), you CAN just spam archer bunnies like there is no tomorrow. HOWEVER, it WILL NOT WORK any LATER OR on nightmare, AND it is less fun than any other strategy.
@Boffo: You must use spells! For many other bosses you can just spam certain animals, but for this one you must switch up your strategy. Ice helps slow, whatever deals your highest damage on one enemy should be another. Maybe poison for 3rd mace? Use x2 prayer rings if you have no trouble on enemies.
Also, a combo I found worked well is speed + mana regen + heal + fire. Fire has decent damage, excellent AOE, but low range means you get hit alot. So, you rush in, spam fire, run, heal, repeat. This also lets you keep up a near invincible wall of units, as you can just heal them as you heal yourself.
Also, don't get non-staggering unless it's blue, and only if one is runed and one is another from the list. You want to get stun to at least 30%, preferably 40% or 50%. Rings and non-glove armor don't have staggering often, so make those runed. Quivers, Bows, and Gloves seem to have the best chance for staggering, so make SURE you have it on those.
On the survival level, 4 rangers, buy as much runed, staggering, and some speed/ accuracy/lethality/poison. Then you can rain arrows every turn, keeping everyone stunned constantly, while lethality/poison kills. Surrender until you have a full inventory of these items (as you keep items but the store refreshes when you surrender)
I used blade boomerang for the entire game once I got it. If you upgrade vehicle until you get faster engine, you can drive along the boomerangs and pretty much kill everything. Then, if you get weapon upgrades, your ammo will last for longer. At max weapon and fast vehicle I got to the bridge without running out. I first won at 10 trucks left, and never found a weapon any better than it.
Really excellent, but feels.... slow. Faster fire rate, no quirks (no close combat damage), more clip (seriously, 1 upgrade = 10% more clip when you already have almost no ammo?), more/weaker enemies would make this better. 4/5 for now, because it is a pretty good game.