Really Propofol alone would be great

No, you are really do not need this article, almost 30 years old! Propofol is absolutely enough for laringeal mask/i-gel insertion. BTW, midazolam (in these 30 years!) became very opsolent medication, with much more side-effects than benefits. Personaly, I didn't use midazolam for the more than 10 years!

For laryngeal mask insertion, propofol plus midazolam is not necessary, only propofol is sufficient.

Both Propofol and midazolam are hypnotic agents that inhibit consciousness in a dose-related manner. It makes no sense to combine them. This is called “polypharmacy” and it undermines predictability. A better approach in my experience is to begin with a small intravenous or intramuscular dose of fentanyl, wait until it begins to take effect, and then perform mask induction with Sevoflurane. The fentanyl will obtund the offensive smell of the inhalation agent and reduce its requirements in half, and produce vocal cord relaxation equivalent to paralysis with a little practice, and with far greater safety. The LMA is a dangerous and treacherous “crutch” that is no substitute for elective endotracheal intubation. It is useful for “rescue” of “can’t intubate, can’t ventilate” predicaments but these can be avoided by using mask induction as described above.