(Standadrd) Looking for clarification / advice about Blast Rain CoC DD/VD, Asenath's Chant desecrate

PoB : https://pastebin.com/DhwpKLjq

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Blast rain is probably hitting multiple times per attack right? which means that with full ramp it's almost guarantted to be hitting coc proc cap?

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If I understand correctly, in my current setup :

Desecrate in Asenaths creates a maximum of 12 corpses per desecrate, up to about 3.5 times per second. Given the way I've placed the spells in my bow, DD will first explode 5 of those, and VD will then explode the 7 remaining corpses, which kind of "wastes" a potential 8 more explosions?

Ideal single target DPS is then capped by how many corpses I can generate per second, minus the ones that get consumed by Kitava's Teachings and my offering?

(Shouldn't I just stick with VD since it's consuming all the desecrated corpses by itself actually?)

I had the (not so) smart idea to put AwGMP - unearth in Asenath's, thinking this would give me more fuel for VD and DD. Then I realized that Asenath's CD is shared across all spells in it, so I was just gimping myself. Good job me. Anyway, took that out.

Sticking unearth somewhere (like a cwdt gmp setup) would maybe increase the DPS?

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Edit : using a Arcanist brand- GMP - Divergent Unearth seems really good for single target