use diamonds instead of red gems for more resistance to all. switch laws of valor for laws of justice with the immovable object rune... laws of valors damage plus is just a plain joke that is only interesting for t13 rifts. when it comes to high GR rifting, this is just ueless. laws of valor with the mentioned rune gives you a shitload of defense every few seconds. with enough CDR it is almost always up...
these 2 changes possibly combined with unity instead of CoE will make you almost indestructible... but i can tell you one thing. when it comes to higher rifts in the late 70s you will have to rely on the holy bonus from CoE as single yellows or even some riftbosses are pretty much hard to kill as single targets out of the holy part of the CoE cycle... so unity might be good in the beginning but in late 70s rifts, you have to dump it for CoE...
oh and before i forget it. definately dumb the rapid decsent rune for falling sword and choose flurry. the bot cannot handle falling sword correctly if the mob group is too big (thus resetting FS instantly and the bot then keeps spamming FS and does not use hammers anymore to kill the stuff around you). same for cooldown shrines. the flurry rune with its incapacitating the enemy for 5 seconds stuff also gives you another defensive buff.
do not worry. falling sword will be resetted extremely quick even without the rune. so you can still keep the 8 seconds damage reduce buff from it...
if you have a good amount of ancients and augments, you should be easily running early to mid 70s...