Assuming a NS threshold of 50K NS or infra of 5K, this would keep about 40 of your nations in peace mode out of 291. Looking at your total stats, about 200 of your nations have at least some economic wonders and around 150 have close to a full set (excluding the high infra wonders.) Excluding the 40 peace mode nations, you still have at least 100 of your nations that should be able to rebuild quickly. Many of those nations should have enough left over warchest to rebuild themselves and start aiding out immediately. The others, if they are competent, shouldn't take very long to get there.
Speaking personally, if it were up to me (it's not) this war would end in grey peace (just an admission of defeat / surrender) across the board. But I think y'all are greatly overstating your case here.