As I was saying, there's this constant need to add more and more damage to whatever the leveled characters are doing. I felt at this point it might be a good idea to know upon what we're improving - since I've been using the same damage-dealing standard for characters for nearly 35 years, and I have no problem with it.
First, however, THAC0. I realize that many don't like it, that it's a mechanical name that takes away from the fantasy substance of the game, etcetera, which they claim breaks immersion. What I know is that it enables me to calculate hits and misses very quickly for dozens of combatants, meaning that my game moves faster, there's less opportunity to be bored, the players get answers back immediately and they even gain a better conception of what they can manage to hit - so all around, THAC0 is a practical mechanism for me. If the acronym, however, is all that it takes to break immersion from your game, well . . . that's all I need to say.
I use my own THAC0 table, based primarily on the original tables in the DMG, except that I've smoothed out the improvements so that instead of the cleric's attack jumping two points in three levels, it jumps incrementally over that time. Also, I've gotten rid of the monster tables for half a hit die, 1-1 hit die, 1+ hit die and so on, which we should all admit was pretty stupid thinking from the start. I must presume the creators thought that splitting those low numbers fine would somehow improve the game?
Here's the THAC0 table I've constructed:
Simple, nyet?
Given this table, let's ask ourselves what damage could we expect a fighter to do in the space of three rounds, on average, against armor class 6, using a spear. The answers are in this table below:
The three rounds need not be consecutive for the table above to apply, nor does it matter if the fighter was hit or not between attacks. The average of the weapon was multiplied against the chance of hitting, then that number was multiplied by 3 in order to get the above result. The purpose for viewing this as three rounds rather than one is to emphasize the clubbing power the fighter would have in the space of a short combat.
Note that our fighter has been limited by a few things. First, it assumes he never upgrades to a long sword or morning star, both of which have higher average damages. It also assumes the fighter never gets a magical weapon of any kind. However, to see what a 15 strength fighter does with a long sword rather than a short sword, one need only compare the next line of figures over - so that a long sword at 1st level causes - on average - 1.05 more damage in three rounds. Taking a 16 strength over a 15 means that - assuming 10 rounds of combat per session and two sessions per month, your fighter (mysteriously remaining 1st level) will cause an average additional 84 damage (exactly, as it happens) over 240 rounds. A number that will expand as you go up levels. Something to think about.
The terrific jump at 7th level is due, as some will remember, to the fighter now receiving 3 attacks every 2 rounds; the similar jump at 13th level is due to the fighter now gaining 2 attacks per round.
Of course, some readers will think the combat numbers above are paltry. A 13th level, however, would probably have a +2 or +3 sword in my campaign, which gives increased chances of hitting and damage, so the numbers get up there. And I think killing a couple of ogres in three rounds on average is fair. The fighter has support from henchmen in my campaign and on the whole I think the combat effectiveness rises quickly enough.
The first problem I see is NOT that the fighter doesn't do enough damage - but that the fighter's attacks don't increase more incrementally, as the THAC0 does on my adjusted table. That shift is too stark and the fighter shouldn't have to wait that long for an improvement. The monk gets 5 attacks every 4 rounds at 4th level; I see no reason why the fighter shouldn't enjoy some incremental improvement like that. I've run many monks and keeping track of the extra combat is not that difficult - but then, there are way more fighters at the table than monks, so perhaps some sort of physical system would need to be put in place.

The proposed results would slow down the fighter at 7th level, but the players may be willing to take that slow down if they get more attacks at an earlier level - which they would. Three earlier levels in fact, as early as the monk gets it. The monk improves much faster, however, getting 3/2 attacks by 6th level - so the monk's superiority is not lost in this instance.
Except for possible clerical problems, I feel this system would provide some benefit to the fighter in the face of the extra abilities I am adding to other classes with recent sage tables (but then, I've been convinced to include such tables for the fighter too, but that's another post).
How would this adjust the above table of average damage? Well, it wouldn't have been fair not to include an updated table, so here it is:
The jump at 13th level is still extravagant, but the overall improvement level by level is better, I think. I should implement this, see how hard it is to keep track of the total number of attacks and who does what when (remember that my stunning system will stagger the second attack for everyone involved) and then take steps to manage that additional difficulty.
It isn't enough to say, "it's too difficult to manage" - what we need to do is design a system by which everyone can easily and comfortably keep track of those extra attacks, including the DM. Won't it be fun when the party is attacked by a team of 4th level fighters?