You expertly answered your own question within the question :]
With 1 Timothy 2:5, @TBFL / Thomas rightfully confirms what is in the bible, which is the Word of God and the plumb line of Truth and sound doctrine.
The regrettably errant concept of praying to “saints” or that they can somehow intercede for us is not only unsupported by the Word of God it is actually contradicted.
26 Likewise the Spirit also helps in our weaknesses. For we do not know what we should pray for as we ought, but the Spirit Himself makes intercession for us with groanings which cannot be uttered. 27 Now He who searches the hearts knows what the mind of the Spirit is, because He makes intercession for the saints according to the will of God.
Even the saints required assistance in prayer from the Holy Spirit demonstrating that they are no more qualified, capable or authoritative in petitioning the throne of God than anyone who has received the (Holy) Spirit of Adoption through faith in Christ (Romans 8:15).
Hence why we are encouraged to be…
18 praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saints—
Note the Word of God reads “supplication for all the saints—” and not “to/through/via/with”.
As for ‘saint of the impossible’…
27 Jesus looked at them and said, “With man this is impossible, but not with God; all things are possible with God.”
Hope some of this may be useful to you Gloriamaria - I’m very glad to read that you pray directly to Jesus Christ for He directly died for our sins and ascended to sit at the right hand of God the Father as High Priest forever (Hebrews 8) and He alone is worthy of our full praise and direct prayer.