One of my players wanted to play a Metamind, but of course, the core version is very lame. In fact, unplayable. I didn't want to change the core version a lot, but I did want to go with the same concept of a lot more PP, slightly less powers.
So, here is my version that I gave to my player as an option. I hope other DMs can use it.
Level 1, 10: no manifesting class gain.
Levels 2, 3, 4, 5, 6, 7, 8, 9: manifesting class gain.
Gain "Lesser Font" at 1st level, one round per manifester level. So, one round at Metamind 1. Two rounds at Metamind 2. One minute at Metamind level 10. But, the PP from the Lesser Font are limited to 1 PP per manifester level unlike the Level 10 Font which is PP limited only to what a PC can manifest in a single round (and it replaces Lesser Font at that point).
The rest of the class is the same.
The Metamind compared PP-wise and ability-wise with a same level Psion, this becomes (for a level 7 Psion taking Metamind at level 8):
8: 56 58, Lesser Font, lose one manifester level, i.e. - 2 powers, ~2 PP less for int, etc.
9: 82 72
10: 116 88, - feat
11: 147 106
12: 182 126
13: 224 147
14: 271 170
15: 317 195, - feat
16: 374 221
17: 239 250, + unlimited PP Font, lose one manifester level, - 1 power, a few less PP for int
18: 263 280
19: 294 311
20: 324 343
Note: These PPs do not include Int modifiers which are a few points higher for the Psion (due to one and eventually two higher manifester levels). Levels 8 through 16 include the max PP from the Lesser Font which is known. Levels 17 through 20 do not since the PP could be much higher each round.
As can be seen, he gains more PP every level (except 8). Level 8 is a dip, but that's the price he pays for entering the PrC. At level 9, it is only about one more max PP power per day. At level 16, it is nearly 10 more max PP powers per day. Course, most of those are in one encounter. And level 17 allows for some real PP power output. But still, this works much better than the Metamind in the book which is out and out not useable.
And, he still loses 2 feats and 3 powers to do so and manifesting levels for powers which make them slightly weaker, slightly less range, etc. But, the book rules are not balanced and nobody (who looks at the math) ever takes a Metamind. With my rules, it's feasible to take one. More PP, less feats, powers, and manifesting level is slightly weaker than a straight Psion.
Power to burn baby!
I think something like this is what it should have been in the first place.
So, here is my version that I gave to my player as an option. I hope other DMs can use it.
Level 1, 10: no manifesting class gain.
Levels 2, 3, 4, 5, 6, 7, 8, 9: manifesting class gain.
Gain "Lesser Font" at 1st level, one round per manifester level. So, one round at Metamind 1. Two rounds at Metamind 2. One minute at Metamind level 10. But, the PP from the Lesser Font are limited to 1 PP per manifester level unlike the Level 10 Font which is PP limited only to what a PC can manifest in a single round (and it replaces Lesser Font at that point).
The rest of the class is the same.
The Metamind compared PP-wise and ability-wise with a same level Psion, this becomes (for a level 7 Psion taking Metamind at level 8):
8: 56 58, Lesser Font, lose one manifester level, i.e. - 2 powers, ~2 PP less for int, etc.
9: 82 72
10: 116 88, - feat
11: 147 106
12: 182 126
13: 224 147
14: 271 170
15: 317 195, - feat
16: 374 221
17: 239 250, + unlimited PP Font, lose one manifester level, - 1 power, a few less PP for int
18: 263 280
19: 294 311
20: 324 343
Note: These PPs do not include Int modifiers which are a few points higher for the Psion (due to one and eventually two higher manifester levels). Levels 8 through 16 include the max PP from the Lesser Font which is known. Levels 17 through 20 do not since the PP could be much higher each round.
As can be seen, he gains more PP every level (except 8). Level 8 is a dip, but that's the price he pays for entering the PrC. At level 9, it is only about one more max PP power per day. At level 16, it is nearly 10 more max PP powers per day. Course, most of those are in one encounter. And level 17 allows for some real PP power output. But still, this works much better than the Metamind in the book which is out and out not useable.
And, he still loses 2 feats and 3 powers to do so and manifesting levels for powers which make them slightly weaker, slightly less range, etc. But, the book rules are not balanced and nobody (who looks at the math) ever takes a Metamind. With my rules, it's feasible to take one. More PP, less feats, powers, and manifesting level is slightly weaker than a straight Psion.
Power to burn baby!

I think something like this is what it should have been in the first place.