Using the standard DMO Wizard builds (
http://www.diablofans.com/builds/70759-s5-gr90-solo-arcane-orb or
http://www.diablofans.com/builds/69933-quin69-gr88-dmo-wizard-solo) and vaguely decent gear (5 ancients with +250int on each and an ancient weapon) and Paragon 500+ you should be able to easily clear G-Rift 70+ with the following settings in Trinity 2.14.19 (NOTE: Area Damage is REALLY important on gear at this level - more so than CHD and CHC especially on rings)
If you are lower Paragon or less geared (but still have all the required items) then these settings will still clear G-Rift 60+ - you might need to lower the Minimum Trash Mob Pack Size to 5 or 6.
The principle is that you want to group up as many mobs as possible - setting the minimum mobs to 6 or 7 ensures you run past quite a few mobs - who will chase you and eventually catch up when you start to fight a big group. You might get a few stucks on maps with small rooms and lots of doors, but the teleport will get you past those quite quickly. We want to ignore low value rift monsters (that contribute less than 0.1% to your Rift percentage, but we want to always kill mobs which will contribute more than 0.5% - unless they are really high hitpoint mobs - in which case we will ignore them. The thing that took me from Grift 73 to 75 was ticking the Ignore minions - this is incredibly powerful as the bot will focus on the main Champion elite and ignore the other 3 minions around it - when you kill the main Champion you get 4 progression orbs and the bot then runs onto the next group without needing to kill the other 3 high hitpoint, low value minions (awesome routine coding, guys!). Don't forget to set avoidances off or really low (you will still die to molten core no matter what) and teleport at 100% and OOC.
I have been testing the "Always Kill Trash below %" - it is at 30% - this only applies to mobs who meet the other criteria - i.e. are within Trash Pack Cluster Radius, more than 0.1% Rift contribution, so don't be surprised if there are some almost dead trash it runs away from.
COMBAT -> MISC
COMBAT -> WIZARD