If you want full Spr or Spr hybrid, best is go Diev 3 or Bokor 3 since Owl statues and zombies damage scales off Spr. Unless you are trying to extend duration of Methadone & HF, going Krivis 3 is not recommended. Sadhu 3 requires full INT to take advantage of Transmit Prana damage buff.
Bokor 3 is needed if you want Zombie damage since Zombify max and Ogoueve is needed to boost zombie damage.
Diev 3 + Miko is recommended to get the ‘Fortress Build’ of 5 Owls statues along with a huge load of useful buffs for soloing high level content. Be warned, Miko quest is long and the voucher to skip the prerequirement quest is expensive but the payout is so worth it.
I was a Fortress Build before Rank 9 and after 1 week of rank resetting my Cleric (along with a few mil of silver in changing the gender over and over), I just come back to this build in an ironic full circle. This build is just too good in sustain and damage. HG 340 is a joke for this build, and there is no need to use any pot at all. Zemyna and SPR can easily fill up your Sp bar in seconds. HF and Ausrine negates Methadone’s side effect of taking more 20% damage. Full or High Spr mean you can spam level 11 Pandemic ( for the Incineration spread Attribute) with no worries.