Are your tent measurements in metres or feet? I'll assume metres.
I've done both lollipopping and topping, but not in the method I grow now.
Also, I don't veg... I go straight from clone to flower.
This all depends on the height of your tent. If it is 7', I'd veg for four weeks and then flip, probably with a White Widow if you're looking for potency.
-spek