[Looking for opinions/advice/enhancement] Dissolution of the flesh power siphon wander

Hello,

I was planning a build around Dissolution of the Flesh, the high hp it was giving, in combinaison to rathpith globes and its futur buff. You can get a fairly high amount of spell damage for almost free, and I though of using that in an attack build.

Basically, the build is composed of the following:

-Really high hp build, buffed by Dissolution of the flesh (10K hp)

- Since Dissolution is not made for being in the melee, you use a ranged weapon. Since rathpith is giving an unholy amount of spell damage (500% with 10K hp), bows are out of question. Wand it is.

- Since you have a very high amount of hp, bloodthirst is also giving an high amount of flat damage (200, in this case).

- The build then proceed to convert this flat physical, and stack the "added % of physical as X". Inquisitor is used so the resistances aren't a bother.

- Crown of Eye is used over the mastery because the 50% bonus are significant, and you really want the accuracy.

- The wand skill used is power siphon to abuse its relationship with barrage (16 projectiles yolo).

- The rest of the gear is filler, outside 35% conversion into whatever element which is required for the gloves.

The pob: https://pobb.in/YXbjBG6Q6Gmu

The build felt fairly cheap (but we never know how prices may vary with new league). Did I put things way too expensive (outside the fairly loaded rings and jewels, and the enchant on crown of eyes)? The goal is around 20 ex. Did I miss something critical about the build, making it worthless for some reasons?