A'koss said:
I've long held that LL armies just aren't going to happen in a D&D world with standard levels of magic and level demographics.
Honestly, it still might wind up looking more like a modern army than anything else, but I don't think that'd quite be the case. You'd definitely disperse the units so one fireball wouldn't get everybody, but that makes melee combat harder, so your units suddenly develop a reliance on ranged weapons. You'll also start having to have more independent and quick-thinking soldiers on your side, so they won't run away and hide. So, they'll need to be higher level, and that in itself presents a problem.
First, where do you get your Ftr4s? Unless you've got a severe orc problem, you're going to wind up losing most of your initial batch of troops, and that's bad. Instead, you need to devise ways of training the troops, so it's now on to boot camp to make sure they get their EL 1 and EL 2 encounters at a steady stream. And boot camps are expensive.
Second, now you have to equip and protect them. That adds up fast, especially since a loss of a soldier will represent a loss of most of his gear, and the money you spent training him. So, you invest in healing magic to keep the soldiers alive longer, but you have to balance it where the spending on healing isn't going to outweigh the benefits of keeping the trooper alive.
Of course, this means you have to have a booming economy to afford the 10k or so GP this company of Deathstalker-grade soldiers will cost you to raise. Of course, a medieval society is not that productive, but hey, we've got magic items being made every day, so there *obviously* has to be something going on; your druids and Plant clerics are busily increasing the bounty of the fields and herds so there are fewer farmers and more specialists who make the economy go farther faster.
So, now that you have your army, and your mages and clerics to run alongside them. What do they cast? Not that much evocation, really. You've got limited slots/day, and tossing a fireball is a waste when the army's so dispersed. Instead, they'll probably concentrate more on intelligence and counterintelligence (scrying, tossing illusions, etc.), and movement and countermovement (increasing the speed of the mounts, suckering the enemy into thinking there's a bog there, etc.). Sure, they'll have a sonicball or two loaded for any big things you might run into, or for targets of opportunity, but that's why the gods gave us wands, anyway.
Hrm...it does look sort of like a modern army. Especially if the teams of artificers back home build little crystal ball networks for inter- and intra-unit communications, and the bases have portals keyed to the most heavily defended fortress in the empire, and, and...
Brad