Capping with Smite

Total Damage will affect your base range, but your base range cannot exceed 2m~2m.

I know that total damage affects it, but I believe it was proven by Proxied that the damage range cap was only a visual cap and not actually a hard cap. Iirc, he tested it with poison damage with max range and then used an attack buff and luk potion, and the damage increased afterward with no other changes while maintaining the same range. Limgoon also exemplified this by upgrading his tyrant equips after he was already at max range and his damage continued to increase. The argument could be made that he upgraded that so he could cube other stats on his weapon while maintaining max range, but I don't think this is the case.

Of course, other than DoT and summons, all of this isn't really testable until Unlimited hits anyway.