Nice config, I think there is no need to adding more on demand scanners, well although you think you might need it of course. Since you have a good browsing habbits, there is no need adding more on demand scanners, I believe with your habbit the only "malwares" you see on your Av's log (or any on demand scanners) just a few bad cookies
I agree with Koroke San and Mr.Exterminator, adding last pass as your browser ext is also good, besides afaik lastpass encrypt your data too, so it could give us a lil bit peace of mind when do banking online, and as for on demand scanner, if you think you want it, yes avira PC cleaner that Koroke San told you is a good product too, anyway thanks for sharing your config