i know that topping can stress somewhat.
and u will get smaller buds, but more of them.

i've always topped usually 2-3 times during veg. 0 times in the flowering stage.

usually my first top is cut around the 5th to 7th node, so the main stem wont be so tall and can support a heavy bushy plant better.

no experience with indicas, just sativas.

good luck.