A popup like the ones you get when surrendering or clearing your orders. That way you cant spend AP on the wrong things (which I happened to do a lot cause I'm dumb, clumsy, and usually sleepdrunk when playing WZ), and just invest it all into JS.

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As a side note, the JS upgrade went from 3% to 2%, is that just a rounding error that got fixed (since value is probably 2,5%)?