Already ahead of you on this one Smapty :) Was running no tanks when Chaze + GK dominated everywhere.
https://forums.galaxy-of-heroes.starwars.ea.com/discussion/comment/1102777/#Comment_1102777
No tanks can work fine if you have speed and the ability to remove TM and / or generate tons of offensive turn meter for your team. Also - O down is key so Tarkin's rework is what allowed this before along with +1 CD removal from DN. Held very well on D also - you don't need tanks to defend. I was holding top 10 for a bit on a Nov '15 launch server. What actually ended it was Thrawn unfortunately - his leader crushed DV's lead. DS taking out DS - kinda like EP does vs. NS now.
You actually may want to try this toon configuration, just with EP and DV switched of course.