Is it permissible to combine intentions in acts of worship, such as reciting Ayatul-Kursi with the intention of it being among the post-prayer remembrances, and the morning and evening remembrances; and praying the Sunnah of Dhuhr with the intention that it is a Sunnah, and a prayer for the sake of Allah, and a prayer of Istikhara?

The issue of combining intentions was previously clarified, and that there is no harm in combining the Sunnah of Dhuhr prayer with Istikhara.

The second question was answered in a previous fatwa.

Regarding the phrase "prayer in the way of Allah," if what is meant is drawing closer to Allah through prayer, then every prayer can be intended for that purpose.