Hi All - Happy New Year

My wife and I have a 40th Anniversary European trip planned for next September. I am HH Gold currently with 220,000 points and I'm looking for some suggestions on hotels in the following cities:

3 Nights in Istanbul
3 nights in Rome
2 nights in Athens
4 nights in Paris
and 3 nights in London

I'm trying to determine the best use of my points, which I expect to increase by trip time. Which hotels to consider as well as which ones to use points and which ones to pay for or the points + cash option.

All comments and suggestions are welcome.