Illaser,
There may be other players better qualified to give suggestions, but here are my thoughts on your deck. Also, please note that I do not know Polish — forgive me if I misidentify some of your cards.
First, your deck has a great deal of control — most of it either slow (poison) or containment (locks). None of your control works on veiled units. Given the deck has limited point potential and only a couple high tempo plays, I would expect it to struggle against decks with most cards that play for immediate value or decks that quickly generate points and distribute them across multiple units. It also has a couple of cards that are strong threats, but that are not well supported by the rest of the deck so their usefulness will be inconsistent. My suggestions would be to focus on addressing the deck inconsistency rather than simply seeking “more useful” or stronger cards.
Two very good, but poorly supported cards are Vilgefortz: Renegade and Philippe Van Moorlehem.
Usually Vilgefortz is best if you can utilize the card you place in the opponent’s graveyard — rather than merely counting on trading for a good card. (If all you want is to take a good card from the opponent, Yennifer’s Invocation is cheaper and more consistent. But even then, your deck has no real tools to make opponent’s cards useful to you.)
Philippe is very slow, a huge target, and spying tags are not very useful in your deck — you have to wait for the locks and poisons. Generally, I would want a Philippe deck to benefit from spying tags, to have protection for Philippe, to include Van Moorlehem Servants to quickly spread statuses, and to have enough round one tempo to help guarantee a long round for Philippe to develop his threats.
I believe these cards are useful, but you pay a high price for which I think you could find better cards.
I also note that, not counting Philippe, you have 5 locks and 8 applications of poison. These are cards that tend to lose value as you get more copies (you have to settle for lesser targets), so you might ask whether you need so much.
To replace these cards, I would seek high tempo, high point value cards that still synergize: cards like Artaud, Usurper, plain Vilgefortz, Damien, Lydia, even Nauzicca Seargent or Spotter.
