What ways are there to either reduce power point costs or increase the effective manifester level for a psionic power—apart from Overcharge, the wilder class in general, or the torc of power preservation—, so that the power is augmented beyond the usual limits set by your manifester level? Even if the method works for a single power, or a single manifestation, it is still useful.
\$\begingroup\$ Your title says “3.P” but your tags only list [pathfinder]. If you are playing with both 3.5 and Pathfinder material, you should also add the [dnd-3.5e] tag to your question. \$\endgroup\$– KRyanMar 8, 2018 at 2:16
\$\begingroup\$ Ah, I thought 3.P was only pathfinder. \$\endgroup\$– MagosMar 8, 2018 at 2:17
\$\begingroup\$ I edited your question some more, to focus more on the idea that the goal here—I presume—to get more oomph out of a power, beyond the usual limit of your usual manifester level. Please feel free to undo those changes as well if I have misunderstood you. \$\endgroup\$– KRyanMar 8, 2018 at 2:22
\$\begingroup\$ @Magos As addressed, no, Pathfinder is separate from 3.P (3.P being Pathfinder with D&D 3.5 content that otherwise wasn't ported). It's important here because 3.5 and Pathfinder Psionics are very different \$\endgroup\$– IfusasoMar 8, 2018 at 21:17
This Psionic PrC is the simple answer to more manifesting. It doesn't break the limits in an extraordinary way, but it does several useful things:
1) It grants more power points, which is essentially reduced costs aka more manifesting per day.
2) The capstone quite simply says that once per day for 1 minute you gain some defenses and infinite manifesting. Doesn't say he can actually exceed his manifester level, but zero cost powers for the duration of several encounters is really legit
Access: Level 6 to get into the class, level 16 for the capstone.
This is an out-of-the-way base class from Dreamscarred Press (same people who did Psionics for Pathfinder). Akashic magic is totally legit, and this class is 10x more awesome than it seems on the first read. I could rave about it, but I'll cut short the rave with telling anyone who reads this to play this class through level 1-20 just once, and you'll realize how fantastic it I (no...seriously. Do. It.). ANYHOW, the key part you care about is thus:
1) dipping into the class, just 1 level will suffice. The class also has other synergies with just about any class that make it surprisingly useful, even at level 1. A 3 level dip would be worth it, IMO, but 1 level is all you need.
2) Taking the Akashic Augmentation feat. This allows you to invest some of your essence (kinda like power points for Akashic magic) into the feat, reducing the power point cost of a select power. Limited, but nifty.
Access: Dip, so whenever.
This Psionics PrC is your best bet. Dip into an arcane casting class, and then take this dual-progression class. It progresses your casting, meaning you end up getting spells from that dip (useful) but the key part is that you can sacrifice spell slots to boost powers for free. When you are talking things like 9th level spell slots you’re sacrificing, that is a huge augmentation and boost to the DCs. How this interacts with manifester level isn’t clear, but ostensibly it bypasses the limitations since you aren’t actually augmenting the powers. Even if it doesn’t, though, you’re dropping the cost ridiculously. Excellent choice for any super-high-powered psionics manifester build. #1 choice right here.
Access: PrC, whenever you can get ahold of 2nd level arcane spells. I would recommend going after the most spells per day you can.
\$\begingroup\$ Having more power points improves longevity, as does not actually having to pay power points, but neither allows you to amp up the potency of any one manifestation, which seems to be the focus of the question. I don’t think metamind really applies here. \$\endgroup\$– KRyanMar 8, 2018 at 21:44
\$\begingroup\$ Doesn't the cost of the power being free from font of power mean you can use your entire manifester level power point limit on augmentations? \$\endgroup\$– CellheimMay 16, 2018 at 9:42