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Razer Naga Epic something like what you're looking for? https://www.amazon.com/dp/B00NW6T6CC/ref=cm_sw_r_cp_apa_i_rMm-AbM9B5PEK
Edit : I don't know what your definition of overpriced is but in my experience Razer is a quality product for the price at least
~~Razer Naga Epic Chroma - $40 Local cash, $50 Shipped CONUS~~ - Sold to /u/wilciws
Although I find razer mice shit but imho their wireless mice are the best on the market as they have no lagg.
https://www.amazon.com/Razer-Naga-Chroma-Gaming-Mouse/dp/B00NW6T6CC
It's Razer, but it'll do you good to know there are wireless MOBA mice out there :)
Every character is alittle different but this is the basic breakdown. I use a Razer Naga with it's buttons set to numpad numbers, so I have access to 1-5 on the keyboard as a different set of buttons then the ones on the mouse.
Recently my hardware changed so I'm used WASD for movement but plan to eventually rebind to ESDF to movement so I have QWRTAGZXCVB as bindable ability buttons. The less I have to use shift the better IMHO.
I avoid using alt in fear of alt tabbing during combat, but don't forget ctrl is an options too.
I also have less often used buttons hidden on bar 6; sprint, microbinoculars, seeker droid, priority transport abilities, and some of those alternative channel rest items. Bar 5 is empty on this character but on a character that's multi-spec class like my guardian/jugg I have my switchable bar as my mouse's bar. Bar 1 remains my DPS buttons but I'll toggle over to bar 5 if I respec to tank which is laid out for tanking.
I wouldn't even know how to spend that much on an MMO mouse. Best mmo mouse out there is probably the wireless Razer Naga Epic Chroma: http://www.amazon.com/dp/B00NW6T6CC/ref=twister_B004UJ12H2?_encoding=UTF8&psc=1
https://www.amazon.com/Razer-Naga-Chroma-Gaming-Mouse/dp/B00NW6T6CC
Don't listen to anything anybody else says... this is the best mouse in the WORLD. He will love the Razer naga epic.