Hi gabi,
It's hard to say exactly what will work for you, but I will share my experience. After thinking much about how to work around "selective ingest" I have found that, for me, it is almost always just fastest to ingest the whole card (Into a folder I call "Incoming"), and then use Photo Mechanic's fast sorting and tagging ability to then organize the pictures in the contact sheet. When I have multiple events, I will often sort by capture time and slide the "thumbnail size" slider all the way down so that I can see lots of images in the contact sheet. Then I can select the first image in a series, scroll to the end of that series, hold down shift and click the end of the series and then I can rename, move into folder, tag, apply IPTC etc. If I move them (or import them into Lightroom), they will disappear from the 'Incoming" Contact Sheet. So I always know that "Incoming" is the Contact sheet of things that need to be dealt with, and I Can work through it methodically until it's all sorted. With a little practice, this has become so fast that I don't think too much about it.
This may or may not help you, but I hope that it does.
-Mick