Quote Originally Posted by col_impact View Post
A wizard army that implements full cover, free illusionary feints to deplete your ammunition, and saps your encampment will be a rude awakening for you, sir. Mwahahaha.
There's not much an army of wizards can do against a mass of clerics all cloaked in bless and readied resistance and sanctuary except run away. Which, granted, they can do pretty well due to expeditious retreat. But they would have to leave their cover before the clerics closed to 600 feet or they would get gunned down as they fled. Magic missiles wouldn't kill enough of them to justify the lives lost as the wizards retreat if they let them within 120 feet, and no other spells are seriously worth considering, seeing as it's very unlikely they would land against a blessed, sanctuaried dex-cleric with a buddy standing next to him readying resistance. Clerics are effectively anti-wizards, this frankly isn't really a fair matchup.

full cover
If this is the Tenser's Floating Disk tactic, the wizards are locked into a slow lock-step approach if they want to keep themselves under the disks as they move. If they're of a medium sized race (and your army is famously diverse, isn't it? An army moves as quickly as its slowest member) they're also prone or squeezing, so half speed in addition. In other words, by locking yourself to this sort of cover, a more mobile force will simply get into position around 500 feet from you (in range of their longbows, out of range of your missiles) step back or forward easily if you advance or retreat within your cover to easily maintain that 500 foot distance, while the rest of their force surrounds you to cut off the expeditious retreat disengagement tactic, then they can advance toward you with attacks readied, get into melee, and clear you out.

free illusionary feints
Minor illusion cannot create an illusion of a creature, and there's no way to animate it. So you couldn't create an illusion of a halfling darting out from under a tenser's disk acting like he's going to cast a spell, at best you could make it look like a rigid "statue" of a halfling appeared out of nowhere. This is not an effective feint.

saps your encampment
I still don't really get what you're going for here. I never suggested the use of any kind of structure, nor do the rules allow for one.