Those ACs sound super-high to me, especially for spellcasters. What's your houserule? And maybe the opponents should be getting +1 for every 3-4 levels instead of 5, if they're still having trouble hitting?
These ACs aren't super-high at all, especially if you roll stats (which
is the default...).
The houserule:
Level 1-5: +0 AC
Level 6-11: +1 AC
Level 12-17: +2 AC
Level 18-20: +3 AC
And most of the monsters bonus's actually exceed our bonus. When we were in hell, we were AC +2 so any creature CR 10-14 had an equal bonus to hit us, and CR 15 or higher actually had a
better chance of hitting us; even creatures of 5-9 CR were only -1 to hit us... so not a huge penalty by any means.
The rule is meant to help mitigate BA so that lower CR creatures have a harder time hitting higher level PCs. It works for what it was intended to do.
Agreed. I can only assume copious magic items. I'm assuming wizard class for lack of more info as many of the spells being complained about are wizard spells. Most wizards, even by level 20, rarely exceed an AC of 16 even with Mage Armor. Shield helps of course, but the duration is so short I would definitely not consider it to be part of the static AC the way Mage Armor is.
This all depends on what style of game you are playing. IME, I would not consider it "copious" but YMMV. We
are levels 19-20 now, so yes we have good magic items, even one legendary item (Holy Avenger). I would say each PC has maybe 3-5 magic items, plus 2-3 potions of healing for back-up if we need them.
For example, my AC of 24 is from my elven chain shirt (AC 14), Shield +2 (AC 18), DEX 16 (AC 21), and our house-ruled Level Bonus (AC 24). As a war magic wizard, I have Durable Magic which gives me
another +2 when I am concentrating on a spell, so then an AC 26. Throw out the
shield spell and it is AC 31. My only other magic items are my winged boots and a staff of healing, along with the potions typical for each PC.
So, you tell me: is that "copious" to you? Personally, I don't think so, but like I said games differ.
shrug 