When is the proper time to make the Mi Sheberach Lecholeh during Kriyas Hatorah?


There is no official optimal time to say the Mi Sheberach for those who need a Refuah Shleima. However, it is usually done at the end of the Torah reading.

In any case, it should not be recited between the Maftir and the reading of the Haftorah. See here:

When the one receiving Maftir has to Bentch Hagomel, when exactly should he do so?