There are sweetspots in premium cabins. For example, I got Mex-Lhr return. Booked WTP for around 1150 usd cash plus 50k points and 40 usd in extra fees and that means 1200 return in business class. Typical fare in business on the route is 3000 usd, so a much bigger ratio in terms of value.
I'd encourage you to look for some WTP flights to Europe and find availability (
www.rewardflightfinder.com) and use your points to enjoy a return trip in Club