If you are following the Mastering Evocation course, then you know none of that is required, right? It seems you are getting bogged down in minor details. There are numerous ways to evoke a spirit, ranging from the simple to the very ornate and complex.
Black candles are traditional, but I have summoned demons with white, blue, and red without issue. In EA 's system, candle colour does not matter so use whatever is handy. I used 1 black and two white when I evoked Lucifer because I had nothing else. If I remember correctly, I used sky blue for Mephistopheles.
For incense, EA recommends copal resin as a good all around manifestation base for any entity.
Offerings are not necessary within EA’s system so he doesn’t cover them. If you are hung up on the belief that you just have to give offerings, look into the work of S. Connolly for suggestions. She has a chapbook called Demonic Offerings available on Kindle.
You don’t need incantations either. It is sufficient just to call, “Lucifer, come! Take form before me, that I may see and hear you clearly!”
However, if you think weird words are necessry, try the Incantation to Summon Forth (which is actually included in the course workbook I believe):