I hear cigerette ash is high in phosphorous and potassium though i think it may be more potassium than phosphorous. Will this help plants during flowering like bat guano etc. AND ULTIMATELY SHOULD I TRY USING SOME?

It's doing a few of things. It's providing carbon in small amounts and some K. It's also jack your PH up which will eventually lock up the nutrients unless you correct it with some low ph water.

I wouldn't do it. There are a lot of better ways to feed your plants.

cig ash is toxic if anything wood ash but it should be mixed with initial soil mix and amendments theres much better stuff out there dont do it

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supercalavagalisticexpialadankbitch... I do not grow marijuana anymore

I would not recomend useing cig ash use some ash of burnt wood during the flowering stage it can help but not a great deal.