Plastic Man is one of the better investigators in the League. He's a jokester and plays the fool, but he'snot as stupid as he portrays himself. (Still not the brightest, and that's one of his flaws, but he's not as stupid as he comes across)
He's immune to telepathy / psionic attack due to the nature of his shapeshifting. His brain just shifts and changes constantly to the point of being functionally eldritch.
He's indestructible even by the standards of the League. Yes, there are some things that can kill him that wouldn't kill Superman, but not many, and they're pretty absurd things (Like Omega Beams). He's immune to physical trauma, and heat might stop him for a time but it won't actually injure him. If you literally vaporize him you might stop him for a bit, but not permanently or even for all that long. Cold is the only real way to take him down in any lasting capacity, and even then it isn't great. He has absolute control over his molecular / atomic structure, as in every atom of his body is technically a part of his consciousness and can be controlled individually. The "scattered throughout the ocean for thousands of years and put himself back together" feat isn't hyperbole.
He's very strong, but exactly how strong varies immensely, you'd have to ask Zoat for a more specific guestimate as to his strength. Probably not Superman level, likely topping out at Wonder Woman / Aquaman level. On top of his absolutely bullshit tier shapeshifting.
The only things he could conceivably have to work on are his 'vulnerability' to magic and cold. Oh, and being utterly atomized and scattered across the planet or further or being dropped into a black hole or non-existence rays. Y'know, weaknesses totally unique and specific to him.
