DA probably needs to be 2700ish for MC. To avoid crits. Generally you look towards 3k for an easier time - but that’s only for a few things that reduce your DA. There are also consumables that can be used at those critical times.
Unfortunately with non-shield retaliation builds, you can’t really profit off on-block heals. So you probably want to look at regen and wpn damage leech/procs.
Some ways to get OA is to reduce the enemy DA (basically same effect). Similarly you can get higher DA by reducing enemy OA…but it’s generally safer to have a minimum DA where you don’t have to actively do this all the time.
And if you are concentrating on retaliation damage, then you probably want to push %retaliation bonuses as high as possible. % type bonus works for only non-retaliation and %retaliation only works for retaliation.
This particular 2H sword has no bonus attack speed and thus is really slow, so if you are keen on auto-attack being the focus, you might want to look at grabbing as many attack speed options as you can (gear, devotions, components) in order to maximize that damage. Consecration investment can help.
Here’s an example of more focus on the %retaliation as the damage source: 2H acid retaliaton sentinel
This is just the way I’d approach this with more focus on the retaliation damage and the associated skills/items/devotions:
Resistances are indeed hard to overcap. Righteous Ferver’s Consecration can provide some extra while charges exist, but sometimes it will not be up. It’s an option.
The helmet complements the sword to almost convert all elemental (mostly fire) to acid.
Judgement’s Crushing verdict node has -290DA, which helps OA.
Since OA can be ~3k for a bit, I’ve decided to go Divine Mandate for some lucky shots (and I already convert + reasonable acid damage). This is not necessarily optimal.
Note this build has a couple of blank green items, so maybe you get lucky and find useful affixes to help OA/DA/resistances, etc. I am reluctant to define those as I do self-found. If not, then you just pick some. I suppose those could be replaced with non-MI items - those are probably what I’d grind for.
When both Messenger of War and Phoenix Fire are active, %retaliation ~2K ( when not 1.6K for reasonable damage.)
I put Oleron’s Blood on the sword more for the damage reduction against hard targets but that could be haunted steel for better leech or something else, depending.
I suspect that this example build should not go with the transmuter on RF…due to all the converted fire retaliaton…but ithe numbers are probably close, though.
Sometimes it is hard to grab enough retaliation and non-retaliation skills/devotions/gear to make a hybrid. These compromises are what makes it a challenge.
also don’t forget to look though blue items. There is a medal with 100OA (Heretic Sigil), that could be useful to get some OA and various other interesting gear. Gear is a really big part of finding these numbers.