If you were to look at older editions of D&D, AC should be capped at 30 (AC 10 base, downward to -10), with perhaps god-like beings able to hit AC 40.
Plate Mail and Heavy Shield would give you about AC 20. Plate Mail +5, Heavy Shield +5 should garner you about AC 30 (assuming heavy armor retains the penalty of no Dex bonus to AC).
So non-magical AC cap is 20?
With magic items cap is 30?
With god-like powers cap is 40?
Shame we cant really make much of a guess at Attack Roll bonuses to compare yet.
Too bad. We'll have to wait for the details on attack roll bonuses to see.
A humanoid with a natural maxed out strength roll of 1d20(+5) versus a humanoid with a natural maxed out armor class of 20 would hit on a 15 to 20 roll.
Add a +5 modifier for a magic weapon and add 5 for magic armor and you need a 15 to 20 to hit.
with max magic
1d20+10 versus AC25
Ah, that would change things.
I don't see why we couldn't add immortals rules here.
Ah, yes. Correction
natural AC20
with magic AC25
immortals AC30
You're forgetting you could have magic armor + magic shield, which would give a magic bonus of +10 alone (not including the +5 for Str), unless the game to somehow limits you so you can only get +5 from all magic bonuses (say +3 from armor, +2 from shield, +1 from armor, +4 from shield or some combination inbetween). Wouldn't necessarily be a bad thing, but might offend some of the (other) long-time gamers.