How To Play Bone Spear?

I tried the Bone Spear build and I’m at a loss for what to do about mobs zerging me when Blood Mist and Corpse Tendrils are on cooldown.

Right now I’m not using Blood mist (LvL 65) on my bone spear build. I’m using corps explosion to keep my essence up better. I’ll eventually move to blood mist when I get the right aspects.

Here’s my attack:
See monster and shoot one bone spear. Right now it will one shot most including elites. Once the corps is on the ground I cast tendrils on it to pull all monsters into one spot, apply decertify to them and then bone spear the mess out of them. The group usually disappears in a second. If needed I proc bone storm usually against bosses or whenever I need it. My Neco is still a glass cannon so I do go through a lot of potions if I get to close but I’m usually on the edges of the fight throwing bone spear all over the place.