Pure PSI build help

[fuzzyshoggoth]

I just finished Underrail on normal for the first time with an energy/chem pistol build and I've decided to try doing a pure PSI build on hard.  This is what I have so far https://underrail.info/build/?HgMDBgYDDwoAAAAAAADCnwAAAAAswoEQVXfCoMKgwqBGLS5XKyg5PwUqUMK9LiFXwr49wodkwojCt3Lfvw.

If anyone could give it a look and see if there are any mistakes or omissions I'd greatly appreciate it.  I'm mostly concerned with the feat selections (especially whether or not Fast Metabolism is worth the 6 CON) and specialization points.  I'm pretty sure I have the proper skill allotments to craft whatever I'll need and I'd like to keep the social skills so I can pass any checks I run into.

Thanks.

[Goromorg]

Min-maxed Psychosis build:
https://underrail.info/build/?HgMDAwgDDgwAAAAAAADCoDcZAMKgPEsALUZLwqDCoEYyADcrwp3DnAgkLBQqZcK9XyHChMKHwohnZsK3csK44qK1AuKjiQnirIIB4qyDAuKslwHfvw
Psychosis is quite a bit more powerful than Tranquility, IMO, at least in the later parts of the game.

[Sykar]

You can opt to remove one point from willpower and add it to con for access to SI though it is not required.