Does limiting one's prayers to the Prophet (peace be upon him) during times of distress, based on the hadith of Ubayy ibn Ka'b, suffice over other prophetic invocations?

Prayers upon the Prophet, peace be upon him, are sufficient to relieve worries and forgive sins. If a Muslim dedicates all of his supplications to praying upon the Prophet, peace be upon him, his worries will be relieved, and his sins will be forgiven. There are other legitimate remembrances (adhkar) for repelling worries and sorrows and repaying debts, such as the supplication: "O Allah, suffice me with Your lawful provisions instead of Your unlawful ones, and enrich me with Your bounty, by Your grace, from all besides You," and the supplication: "O Allah, I seek refuge in You from anxiety and sorrow, from inability and laziness, from cowardice and stinginess, and from being overwhelmed by debt and overpowered by men." It is more complete for a Muslim to perform all of these remembrances, but there is no harm if he limits himself to some of them.