Ah, I apologize, I believe I've been a bit vague when it comes to the strengths and weaknesses.
As far as strengths go, we're on the same page: things like "stealth" and "hand-to-hand combat" are the character's strengths, or what they're good at, what will help them.
As for weaknesses, I'm looking for things which your character isn't good at, or personality traits which may harm his chances of survival, or an addiction, or an injury/disability.
Some examples of other characters' weaknesses:
- Desmond is an alcoholic
- Scout dropped out of high school, and isn't "book smart"
- Sarah is a reserved, closed-off person
- John has PTSD
and so on.
Those are the kinds of things I'm looking for with regards to weaknesses. In Andrey's case, maybe he has an old war wound which makes it difficult to lift heavy objects? Or, you could build off of the 'remembering the war' part and say he has Post Traumatic Stress?
In the end, for every strength you have listed, you need that many weaknesses minus one.