I use to rarely go 30pts in two trees, but for this it is a necessity. Its pretty straight forward, what my goal was with the build. I leave 10 pts unplaced as its really up too you. I went for 10 in soul reaping and vital persistance, but I think you could justify them almost anywhere.
The runes really are the icing on the cake and help make our “expendable” minions durable little HP fountains (+ a charge/blind/ and much needed “burst” dmg with there active skills.
The well is for combos which our pets actives are the finisher for.