Menexenus said:I think Monte Cook submitted a house rule for this situation long, long ago. If I remember correctly, he suggested that the Tumble roll should be an opposed roll rather than a static DC. Again, IIRC, the tumbler rolled a tumble check and the opponent rolled a d20 modified by his BAB (only). If the tumbler wins, then he/she tumbles by without an AOO. If the opponent wins, then he/she gets the AOO. (I'm sure there's a die-hard Monte-fan out there who could post a link to the article I'm referring to.)
My method is a version of this broad approach, but a bit more complicated. I like it a lot. Characters have an incentive to add ranks in Tumble throughout their career, even after they can reliably beat the base DC's. Experienced tumblers can make themselves all but invulnerable to attacks of opportunity against most creatures, but enemies with large attack bonuses (like dragons) still have a chance, and tumbling quickly through difficult terrain provides a limited benefit for even the best tumblers. It looks like this:benshearon said:Tumble works as indicated in SRD, except that opponents CAN make
attacks of opportunity against the tumbling character. The tumbling character's skill
helps them avoid the attacks, however.
comrade raoul said:Tumbling to Avoid Attacks of Opportunity
You can tumble as part of normal movement to help to avoid attacks of opportunity. When attempting to tumble as part of movement, you can normally move at only half your normal speed (but see below). Make a DC 12 Tumble check. If you succeed, you gain a +1 dodge bonus to your Armor Class against any attacks of opportunity provoked by your movement. Increase this bonus by +1 for every two points by which you beat the DC. Thus, a Tumble check result of 31 made under normal conditions yields a +10 dodge bonus.
When tumbling in difficult terrain, increase the DC according to the table in the SRD. You can move your full speed while tumbling, but you suffer a -10 penalty to your check when doing so. (If you fail your Tumble check, you still have to move at only hlaf speed, as above.) The same Tumble Check result of 31 would yield only a +8 dodge bonus in difficult terrain, where the DC is 17. If you rolled a 31 while tumbling through difficult terrain at your full speed, you'd only gain a +3 dodge bonus.