Hi Po,
The digital era HCD-28/4 and presumably the HCD-24/4.5, hold up well with the higher meg count backs (presuming you employ the DAC corrections in Phocus and Lightroom).
Same for the HCD/35-90/4-5.6 Zoom ... a newer digital design that is very good through the zoom range, but is big and cannot be used on the HTS/1.5 unit.
The newer 50/3.5 MK-II version is excellent and a big improvement over the film era 50mm it replaces. Hasselblad has recently introduced an optical close-up adapter that can be used on a number of H lenses, but was optimized specifically for the newer 50/3.5 MK-II lens. IMO, this is now one of the best lenses in the H system.
The HC-100/2.2 is a much sought after optic for the H system, but can exhibit CA shot wide-open ... not sure how this would do on a 200MS.
The newer HC-120/4 MK-II Macro has allegedly been tweaked for better close-up acuity and less de-fraction at smaller apertures ... although it is hard to find specific information that details this lens' optical performance in comparison to the HC-120/4 lens it replaces ... (perhaps someone else knows?)
The HC-150/3.2N is a tweaked updated version of the previous HC-150/3.2, and is a superb all around portrait lens.
The HC-210/4 is the sleeper lens in the system that is not much discussed, but IMHO is also one of the best lenses Hasselblad offers for the H system ... either that, or I have a freakishly good copy.
RE: Multi-Shots ... for portraits, and any other none static subject or scene, you will be using the single shot mode ... so the 50 Multi-Shot and 200 Multi-Shot would be the same as using a straight 50 meg back. The 50 Multi-Shot does not increase the meg count, so doesn't differ from a 50 single shot in terms of resolution ... it just captures each color separately by means of the 4 micro-step back. The 6 micro-step 200MS does increase acuity, although I do not quite grasp how it all works to do that.
-Marc