The symbolism in Sri Chandi

Sri Chandi-Devi Mahatmyam- is a very potent text. It has so many symbolisms and inner meanings, one feels.
A powerful sequence is when Devi takes on Rakthabhija - the Asura, where a drop of blood falls on earth gives rise to a new Asura of the same kind. As all the manifestations of Devi attack the asura, so much blood is spilled, so many new asuras are formed and the whole world is covered by them. To solve this mess, Devi entrusts Kaali to expand her mouth and drink up all drops of blood before it touches the earth and the asuras if formed. The idea is that subsequently the asura would become deficient of blood and finally collapse. Devi attacks the Asura with all weapons, blood flows profoundly, and Kali drinks up all the blood not letting it fall on the ground. Finally the asura falls.
Clearly the symbolism indicates the vasanas - the tendencies. The tendencies, when fallen on the soil of our samskara - accumulated potencies in a very loose manner - gives rise to a personality. And, tendency is just a celebrated name for desire. So desire takes life on the ground of accumulated tendencies. A detour here, is to note that this is in similar light to the Buddhas Paticha Samuppada-desire arisen in the base of sanskaras give rise to jati. A point to be remembered that the dependent arising is not a linear chain-mutual dependence of every limb is a prerequisite for the other.
Fine, so what does this whole act mean ? Let me jot down some possibilities:

1. The desire fallen on a different base - Kalis tongue, divinity -does not take a new life. In principle similar to Thakur's (Sri Ramakrishna) path of directing the desire to the divine. Lets investigate the 'tongue' a bit more. Tongue is baseless and structureless in itself. It leads to the internals where digestion takes place-a state of flux. So does this symbolism mean that when the desire is taken by a system which does not have the fixed structure - the structure of personality feeling (ignorance and sankara of Paticha Samuppada) - it would not take life.

2. The asura needed attack by two forces to be destroyed: Devi attacking him, making the blood to flow and Kaali to take up all that blood. Does it mean that to eliminate all the negativism we need two pronged attack ? On in which the tendencies flow out, and another in which they are annihilated ? Interesting to note that this two forces faintly resemble the Vishnu Siva tatvas respectively.
This point needs some thought. Every spiritual path has symbolisms about both the facets. One presenting ('out going') , the other withdrawing. Shakti-Siva, Pravritti-Nivratti, Prakruti-Purusha, Yin-Yang. In one perspective, the Theravada principle of Nirvana faintly resembles the latter where as the Mahayana principle of Bodhisatta resembles the former. In Chandi too, the blessing the Vaisya seeks is to attain 'Sanga vichyuti karaakam', to go beyond the self identity (the latter) where as the king sought the former to be born as Manu. Is there some deeper message here ? Is it impied that for complete going beyond, one needs creativity as well as renunciation in the same potency ?

3. The assurance of Devi is most encouraging. She says 'Ksheena raktha bhavisyati' will be depleted of blood - about the asura. Wow ! so is it a promise that tendencies will be depleted on practice ? There is of course, only a limited amount of blood-but I guess this works if the depleting process is quicker than the rate at which blood is regenerated !