I have just sold my H4D-40 and the lenses. Without doubt the 100mm f2.2 you already have was my fave. Looking back through my files I see I used it a lot - more than the other two I owned (28 - which was also fantastic, and 35-90 which I found too big sometimes - although the quality was good)
Back to the 100, I read somewhere that "the 100mm, compared to 35mm full-frame FOV and DOF, equates to 69mm f/1.5". For me this was the perfect portrait lens. I have a theory that the more compressed look of a longer lens (for portraits) is increasingly old-fashioned - it looks like it comes from another era to me. In HCB's days he was running around Paris with a Leica and a 50 lens was pretty much it (talking 35mm again), then street photographers headed to 35mm, and today we see that 28mm is increasingly popular. In other words, over time, things have become a bit wider - and it follows that the wider look is increasingly "normal" to viewers (no, make that "the new normal" because the most popular camera in the world - the iPhone - has an approx equivalent of 28mm FOV, and that is how the majority of people are seeing and sharing the world - wider, wider, wider).
So, back to Hasselblad, the 100 as a portrait lens still gives some handy subject/photographer working space, it resolves beautifully, the "look" is fantastic as it's not as compressed as longer lenses for portraits so looks more modern, and it's small and fast for a Hasselblad lens. Long way of saying my advice without hesitation is to use the 100 for portraits - your work will be contemporary as well as high quality. Now for other needs, sure you may want a longer lens, but for portraits you're set IMO.