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Message: <blockquote data-quote="Diirk" data-source="post: 1850872" data-attributes="member: 14476">So lets take a 10th level wizard, he can cast 5th level spells so core rules would put casting defensively at dc 20. This wizard will most likely have 13 ranks in concentration and +2 from con. Combat casting isn't a very usual feat to take, so I'll ignore it for now. So said 10th caster has to roll 5 or more to cast a spell defensively. Ok.Now under your system, lets take a CR 10 monster... say a fire giant. BAB of +11, so to combat cast a 5th level spell, its dc 31. With a +15 concentration skill. Now he has to roll 16 or higher.See a problem? Even with combat casting he has to roll 12 or higher...How about an efreeti? CR 8 with BAB of +10. Still DC 30. Clay golem is CR 10 and only has a BAB of 8.. so thats "only" a DC 28 check. Great, a 10th wizard with maxed out skill ranks and a feat investment can cast a 5th level slightly over half the time.Maybe this problem gets better as you go up in levels? Lets see.. a 20th level wizard casting 9th level spells (15+9 = DC 24 in core). 23 skill ranks in concentration, +2 con, lets give him combat casting to be nice. So +27 concentration check.What do we fight at lvl 20? hmm, lets see... how about an old red dragon? cr 20, perfect. +28 BAB so you're looking at a DC 52 concentration check. So we need to roll a 25 on a d20. The tarrasque is CR 20 as well but I wouldn't want to be making a dc 72 concentration check at level 20...Even if you take something as puny as a Rakshasa with 10 sorceror levels, (BAB of only 12 ! at CR20), you still need to roll a 9 or more to cast a 9th level spell.... WITH a feat spent. I can't even begin to say how wrong I feel this houserule is.</blockquote>

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