Certainly!
The point of a Cleric 2, Bokor 1, Krivis 2, Miko, PD 2 build is to get Hexing for an easy setup and easily spreadable debuff for PDās Pandemic and Incineration. Effigy for the instant, no-cooldown damange skill that will hit hard on a full INT build like this char will be, it creates excellent filler damage.
Krivis 2 is for Zaibas and you need rank 2 to get the splash damage attribute, rank 2 also brings Divine Stigma, which is another debuff for Incinerate, and the same is true of Zalchai and Aukuras.
So that is 3 debuff skills (+utility with up to lvl 10 Daino and other utility skills) and 1 splash damage skill from Krivis 2, and a debuff and no-cooldown damage skill for filler damage output from Bokor. The main point of picking up both Krivis and Bokor is to pick up as many debuffs as possible for PD.
I also like that having more classes in a build creates a playstyle with more constant button-pressing (less waiting on cooldowns) and more benefits other than just getting better versions of the same skills with higher ranks of the same class. With the direction IMC is going with classes, weapons, and skills at this point unless there is something specific you want from going 3 ranks of a class, there isnāt much point.
What I mean by that is: The increase in damage or duration you get from getting more ranks in the same class becomes less and less significant with us getting weapons with higher base damage, and higher rank classes with such intense damage differences that even 3 ranks of a previous class donāt come close to comparing, so it becomes better to pick up more utility than to try for straight damage with lower ranks.