It’s basically additional property Holy.
Basically added damage to every line. only that part of damage is added on mutants and demon. Magic defense does reduce that damage(elemental defense)
it also triggers blessing to the line. It is more use of a combo via sacrament + last rite + blessing > on ur AA charactesr like QS3
Which give them up to 4 lines on a Auto attack. The additional is Both holy and Magic just fyi. This is useful if you are running rexipher setup.
Run Chapalins/PD(daino scroll) + Fire linking chrono + QS, X2 fill like diev or thau for steriods,
Then see how the QS carry ya with 5 lines of damage. Suggestion is leave 1 point on sacrament in case dungeon expires and you need to AA Something.
Notorius like ET objects have high hp and need either a QS 3/ Warlock with DOT/ Diev to clear it. Additional won’t be bad in this case then.
As for last rites the points you add in just determines how how is the recast.
So you won’t imo need to take it so high at later ranks.
Prolly 1 sacrament , 2-3 last rites. Basically just for additional AA damage / elemental damage for proc.
Exorcise is kinda bad atm even when max. the damage is i dunno. worse than cure? Mostly as a trigger to magnus more towards as a setup of " another flame ground/pillar" in front of you while u shred them with plague vapor + incinerate.
Another note is Exorcism does not affect magnus damage. Magnus is basically a setup spell independent on it’s skill rank and attribute for damage.
If you are into AA inquisitor builds. There is another discussion board for that . Looking at inquisitor kit imo it sitll favor DEX crits build over int/SPR for AA.
Though the extra lines will proc? as mentioned