If the turbo is properly supported you should have no problem with broken studs. When tightening the manifold do it evenly.
Many mechanics tighten one side then they tighten the other side warping or putting abnormal stress on the studs. use all the same type of nuts and washers so that the expansion rate is the same. Copper-coated nuts are great, just use new ones everytime. I have some special washers that lock the nuts on.
but prevent loosening.

So the key is to support the manifold and not let the weight of the turbo ride on the studs.