Would this be right or alternatively please advise what would be the most appropriate prayer/supplication
Wallahu'alam about the specific prayers you mentioned there. Personally I have never heard of them but the sheikh can elaborate. But what has appeared in the hadith is as follows:
Narated by Abu Huraira: Allah's Apostle said, "Whoever establishes the prayers on the night of Qadr out of sincere faith and hoping to attain Allah's rewards (not to show off) then all his past sins will be forgiven." – [Bukhari Vol.1, Book 2, #34]
A'ishah, may Allah be pleased with her, reported that she asked the Prophet, peace and blessings be upon him, "O Messenger of Allah! If I knew which night is Laylatul-Qadr, what should I say during it?" And he instructed her to say: "Allahumma innaka `afuwwun tuh.ibbul `afwa fa`fu `annee" (O Allah! You are Oft-Forgiving, and you love forgiveness. So forgive me). (Reported by Ahmad, Ibn Majah and At-Tirmithi)