I've ridden the Grand Bois quite a bit and tire mortality has not been overly high. They have a wonderful ride.
If you have a problem with flats, assuming your tire mounting technique is perfect, you may want to consider a product called the Spin Skin.
https://www.turtleskin.com/
This is NOT a Mr. Tuffy. It is a lightweight tape - they say it's Kevlar, who knows - but it works. Retail $30 / pair, I run them in the rears only, and have had very good luck with them.
The Vittoria Open Pave is a nice tire too, but it rides like a coal cart compared to the Grand Bois.
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Mark Petry mark@petry.org
Bainbridge Island, Washington USA
122.31 W 47.19 N
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