I have been attempting to figure out how to handle saving throws better. Three (Fortitude, Reflex, Will) just don’t seem to be enough. I have been experimenting with two options.
Option 1
The first option is adding a fourth saving throw called Toughness (or something else) that uses Strength as its primary stat. This would be the saving throw used against combat maneuvers and other types of physical attacks that have traditionally been opposed rolls. In Pathfinder they use Combat Maneuver Bonus/Defense to handle maneuvers like Trip, Grapple, and Bull Rush. I propose to have a set DC based on attacker’s ability score + Base Attack Bonus vs the new Toughness score. And with any new addition, there will be feats, spells, abilities, etc that can improve this change. Some classes will get advantages, such as the Monk.
Wait you say, what about size modifiers? Gone are fixed sized modifiers for combat maneuvers. You can only use most combat maneuvers against a creature 1 size category larger or smaller than yourself. This removes the need for size modifiers in the roll. Some creatures will have bonuses to combat maneuvers, this will take into account creatures that have traditionally be grapplers and those that swallow whole.
Example 1st level fighter (str 16) vs 1st level fighter (str 16)
Attacker rolls a touch attack to initiate the maneuver. Assuming the touch attack is successful, the defender then rolls his Toughness save to avoid the effect (DC = 14 vs Toughness roll of d20+6). The effects of a combat maneuver will be a condition (similar to existing conditions like sickened or dazed). For example: When you are tripped you will have the “prone” condition. When you are grappled, you will have the “grappled condition” and your grappler will have the “grappler condition.”
Option 2
The second option is replacing saving throws with ability score rolls and creating a system similar to current saving throws. This would only happen if there are enough effects that require Intelligence and Charisma saving throws. I’m not entire sure this is necessary or required. I believe that 2nd edition and earlier had 5 saving throws, so 6 wouldn’t be that unreasonable. I’m just not sure that there would be enough spells and effects that would require a Charisma or Intelligence saving throws. I’m also not entirely convinced that Wisdom is a better stat to use with Will than Intelligence, but I’m not will to change it or allow a saving throw stat choice (like 4th edition).
Leanings
I am leaning strongly toward option 1. Having a saving throw for combat maneuvers just makes sense to me. Since Dexterity is used to defend against the initial Touch Attack, Strength can be used to resist the effect, without feeling like it should be one or the other. Both are used.