Is this a decent build for a support Druid? I’m uncertain what skills and stats to invest in, so I’m hoping someone here can help me. 
It’s junk.
Going pure support isn’t a very wise option in this game. Mostly since getting multiple roles in your build is far to easy, and ignoring that means you’re sacrificing a huge chunk of skills.
That and cool downs and limited selection of healing/defensive/utility skills means you can’t get that many in a single build anyway.
Secondly you picked a horrible combination of class circles.
-Cleric2 is only worthwhile atm for pardoners for the divine might boost or sadhu’s for fade+safety zone.
-Priest3 is good for str or spr based builds but pretty darn useless for int builds. (since they lack spells outright, not dmg scaling in itself)
-Druid is best as a int build currently due to physical transformation currently being worthless. (less dmg and less likely to hit enemies then with auto attacks, huzzah) Not that druid would be bad for spr based build, but they simply have classes that offer more synergy then druid does.
If you’re dead set on druid, i’d recommend either a cleric2/bokor2/sadhu/druid or a cleric/krivis2/bokor2/druid as a more support ish options from the sheer invulns alone. Both are int based btw.