On Cleric i would keep SZ at 5 and put the 5 points in heal, that help lots in groups too as solo, you can turn on or off the attribute for damage depending on the conditions of the area you are leveling/grinding/farming.
A small trick for the tosbase simulator, so you don’t get lost in your progress, in Sadhu C1, avoid putting points in Vashita Siddhi, save that 4 points for C2 (since it is your next rank anyway) when you advance, you will have 5 points right off the bat to max Possession, which is actually the best skill for Sadhu as of now.
As of the rest of the skills seem ok to me.
I changed what i said above in the simulator, mine is close to that (the cleric tree, only that i took the point from SZ mine is Lv 4).
As for stats, i put CON up to 100 and the rest in INT, i put some SPR too but that is just me.
I was going Druid C2 at first in my build but since it lack anti-flying skill, i took Kabba, and i will be going to C2 in Kabba, with R9 and 10 (if we ever get there) depending on what come i may take Druid C3 or Sadhu C3.