Just a suggestion regarding combat, when you drag onto a monster/ally, let a submenu appear around your cursor, allowing you to choose which skill to use, with basic attack/heal applied if no buttons are clicked. That way characters can use all the skills acquired, without disrupting fluid gameplay? Apart from that great game, not enough RPG's incorporate attack speed in my opinion..
It would be nice if we could see a more detailed version of our stats, including things such as total Critical Multiplier. Great idle game, though it seems to draw inspiration from SAO.