Only a handful are good from level 1 (prosperity towers is pretty good). Tome of secrets to me is one of the best and most underrated wonders. Very happy people don't like it cause if it gets buffed I will be even happier
The supplies per scout are pretty minor initially, the kp though is good depending on how you play. Allowing for missing some collections it is roughly an extra 300KP in a year that is an extra level or 2 to a wonder, a number of extra techs depending on your era. If you put kp into wonders it can also assist you to gain specific runes. once you get it to level 6 that KP becomes 600 per year which is a good deal of techs and everything else.