Minion, mounts & dye-able gear need to stay in EX & Savage.

I'd even go a step further and remove tome stone weapons, letting them only drop in EX & Savage and make the craft version 10 ilvls lower at each tier but I can already seeing people would want my head even though you don't need max ilvl if you don't do Savage or Ultimate.

I'd even make it so that to get the highest artifact lvl (upgrade) you'd need an item that drops from that tier final boss in Savage but people would shoot me on sight then.