The bases that are linked here are the ideal bases to use Endgame. Until you can get proper Exalted items on the correct bases, don't worry too much about it. The beauty of this build is that, there are a lot of Prefixes we can get on most gear while Suffixes being pretty open too.
One of the biggest upgrades you can make for this build is PrefixExperimental Haste Effect. This mod is busted. If you can get a pair of boots with PrefixMovement Speed, PrefixExperimental Haste Effect & SuffixIncreased Cooldown Recovery Speed you win the game. These boots will give you sooooo much Movement Speed that the build will feel like a whole new build. With Healing Hands w/ Rahyeh's Chariot 1/1 having such a low cooldown, you can keep the Haste buff up with amazing uptime giving you very fast clear.
IMPORTANT: Make sure to HEAVILY prioritize SuffixIncreased Cooldown Recovery Speed on your Belt & Boots. CDR is important to getting Devouring Orb to a ~2 Second Cooldown which makes this build have substantually better clear the closer you get to 2 seconds. Once you also stack large amounts of PrefixCast Speed, your Devouring Orb animation time will be very short making the overall build feel great to play.
EVEN MORE IMPORTANT: With the addition of Healing Hands & Divine Barrier 1/1 getting PrefixIncreased Healing Effectiveness on your Rings is the single biggest upgrade you can make for this build for tankiness. PrefixLevel of Sigils Of Hope on your Relic is really big too due to the fact that you can pick up additional levels in Invigorate 5/5 giving you more PrefixIncreased Healing Effectiveness. To get this to work you NEED PrefixExperimental Ward per Missing Health as you need this mod for Divine Barrier 1/1 to do anything. You can use Last Steps of the Living as a substitute until you get it or, just not worry about the Ward gain until you find the glove mod.
Prefixes
A lot of the items used in this build will be able to roll both PrefixSpell Critical Strike Chance & PrefixCritical Strike Chance. If you ever get the chance to add a Prefix onto an item due to it having an open Prefix, always choose PrefixSpell Critical Strike Chance as the rolls will always be bigger. Try to fit PrefixVitality on every slot you can as each point not only gives Devouring Orb & Smite a very big DPS increase but it also gives you 1% Poison & Necro res per and additional SuffixHealth.
There are a lot of Prefixes that are good and the table below tries to list everything good. A mix of PrefixCast Speed, PrefixCritical Strike Chance & PrefixCritical Strike Multiplier is fine. Don't worry too much about which ones you get and if possible, prio PrefixCast Speed as its a major DPS increase for Smite and it reduces your Devouring Orb cast animation making the build feel smoother.
The single most important Prefix you can look for is PrefixLevel of Devouring Orb. This is a massive ugprade and even if you can find an Exalted helmet with +3 Levels on it and no other useful stats, its still an upgrade. Prioritize this mod at all costs.
Suffixes
Ideally, you want to fit as much SuffixHealth & SuffixArmour as you can everywhere. At first when you start Monoliths, you will need to heavily utilize Suffixes to fix your resistances. But, as you push further on and get resistances from other sources such as Grand Bastion of Divinity, and good bases such as Bone Amulet, while scaling your PrefixVitality which gives you 1% Poison & Necro Resistance per point, you will need less. Eventually, most of your Suffixes will be wasted on resistances. This means in a super endgame build, you will have plenty of space to add on other Suffixes such as SuffixChance to Shred Armour on Hit on gloves, SuffixArmour & SuffixArmour on most slots, & SuffixHealth everywhere.
MAKE SURE you get 1 source of SuffixChance to apply Frailty on Hit on either your Relic, Gloves, or Amulet. Due to it stacking to only 3 stacks and with us doing so many small hits, you will not need more than 1 roll to keep it up. Frailty is a very very strong defencive layer and is very important to fit somewhere.
Idols
Ideally, you can also use Idols to fit any sort of gaps you need in your Resistances. Finding the exact Idols used in this guide will take time and you will most likely be using random ones for a while. Try to use these as much as you can for your res needs.