Well, I'm a nerd. It annoys me the beta stole my statistics.

And 50 AP is a rather large fee for basic stats when your levels only cash you 300 AP, and the upgrade does not improve the game in any way, except satisfying your nerd-need for stats.

Since a lot has changed with every update, and more will change with next update, the only thing I can advise people on the future to get is JS and extra idle time. Those seem to have been stable investments throughout the beta, with army camps and mercs going all over the place.

As for the statistics, 500 AP to get your stats is way too expensive, the price for the stats should be halved!

% increase to mercs is good, I don't think it will ever become a bad stat.