1) I think its specifically the fact that Astral construct is 1 action to manifest, while conjure elemental is 1 minute, hence, it is not designed to be used in the middle of combat, you have to plan ahead and cast it before. Also, if your concentration is broken the elemental turns hostile and attacks you, and continues for 1 hour, so the spell has those 2 strong drawbacks. With Astral construct there is no drawback, you can just cast it in the middle of combat at whatever level you desire and if your concentration is broken it just disappears and you are free to cast it again as soon as you have one action to spare, So the psion power is indeed better and much more versatile than conjure elementals. For comparison, conjure minor elementals doesn't have the drawback of the summoned creatures potentially turning against you, is a 4th level spell and at maximum lets you summon one elemental of CR2.
You're right, conjure spells are 1 minute. I will change the Astral Construct to match.
You're right that the elemental can turn hostile, but that's only true for the
Conjure Elemental spell.
Conjure Fey (6th level spell) summons friendly beasts of Challenge 6. With
Conjure Fey I can summon a Mammoth.
Mammoth: Challenge 6, 126 HP, 13 AC.
+10 to hit for either 25 or 29 damage. Prone if the Mammoth charges
Astral Construct (6th level): Challenge 6, 127 HP, 17 AC, condition immunities.
+7 to hit for about 32 damage per turn if both hit. Enhancements for either more damage or utility.
Conjure Celestial is garbage and not worth using as a comparison. (7th level for a Challenge 4). It is mainly used for the spells.
Conjure Animals, Conjure Minor Elementals, and Conjure Woodland Beings are all trash when used to conjure the maximum challenge creatures. If you look at guides for these they always recommend abusing the lower level slots.
Conjure Animals (3rd), Conjure Minor Elementals (4th), and Conjure Woodland Beings (4th) can be used to add 1,000 XP to a combat (8 * CR 1/4 = 400 multiplied by 2.5 as they are a gang gives us 1,000)
Astral Construct (4th) can be used to add 1,100 XP to a combat.
Based on Conjure Elemental (ignoring the losing control as I'd say that is more rare) and Conjure Fey the current Power Level = Challenge is decently balanced. Even looking at it like that I wonder if the power could be used by all Psions and not just one archetype.
I did make the 8th and 9th level higher CRs as those level of powers are really really strong so it has to be slightly stronger by comparison (8th level astral is a CR 9 and 9th level astral is a CR 11).
Now, all of that said: I'm probably on the high end of the balance. Adding lots of HP soak and mediocre damage can have huge value. Especially with the utility granted by the enhancements. I could perhaps lower the challenge by 1. Thoughts?
2)So THAT's the design reasoning behind that choice, intriguing......
I altered Psicrystal to remove climb, increase flying speed, replaced blindsight with darkvision (fits more the golem style instead of animated armor. Psicrystal has a personality so it's more like a golem). I think the Psicrystal would be fine without the bonus HP for fusion. Fusion giving around 30 hp is a pretty bad buff anyways, so perhaps it isn't worth keeping that usage? Thoughts?
Yes, I like the psi points version much better, even if it presents some challenges in presentation!
Great! Thanks for the feedback. My player and I liked the straight psi points version more as well.
Regarding the high level powers: I think level 6-8 are fine actually, but you really should not be able to manifest 6 9th-level powers in a day, since they are dramatically more powerful than 8th-level or lower. I would add a special exclusion just for powers costing 13 pp, and otherwise keep the scaling limit on 9pp+ powers.
So, add exhaustion after the first power using 13 power points? Something like:
"Powers that you manifest using 9 or more psi points (6th-level and higher) are particularly taxing. You can use psi points to manifest one power using 9 or more psi points. You can't manifest another such power until you finish a long rest.
The number of powers you can manifest using 9 or more psi points increases to two when you reach 13th level, three when you reach 15th level, four when you reach 17th level, five when you reach 19th level, and six when you reach 20th level.
Powers that you manifest using 13 psi points (9th level) are especially taxing. For every additional power you manifest using 13 psi points, you gain a level of exhaustion."
Added the part in bold. The wording isn't 100% clear. Maybe you have a suggestion to clean it up?
Speaking of 9th level, something I came across while scanning the power list: timeless body says
For the duration your body ignores all effects. While timeless body is in effect, you are immune to all damage and automatically succeed on any ability check or saving throw.
Succeeding on any ability check (even ones that are not meant to resist grapples, et cetera) is probably not what was intended here. Also, the pathfinder version makes you immune to friendly effects as well, and only lasts until the end of your next turn. What's the goal of this power? As written it is too strong even for a 9th-level power.
According to
Mind Over Everything: A Pathfinder Psion Handbook the
Timeless Body power is pretty mediocre: "
Timeless Body - Make yourself invulnerable for a round. Only you. Disable the thing that is attacking you and save more than just yourself."
I don't think it's too bad. It could be useful to prevent a sure death. Though I'm not sure it's even worth learning the power. The goal of the conversion was to maintain the flavor of the becoming invulnerable to damage and powers and buffing it so it lasts up to 1 minute instead of 1 round and buffing it so that you also cannot be pushed away, pushed prone, hit by a monster's ability that can stun you, but isn't a power/spell.
Why do you think it's too powerful? Would this actually be a power you choose over other powers? What situation would it be too strong for?
The main argument against would be the ability to walk through lava or utility type situations.