Dear mimiso ,
Regarding the question of a spiritual entity from one religion being appealed to by an adherent from another religion:
There is a long history of this in magic, but not every religion smiles upon the practice.
Some religions describe their gods and goddesses as friends who may reach out and help anyone, without requiring the supplicant's initiation and/or a formal declaration of adherence to the religion's basic tenets -- not even a monetary donation. It is typical of adherents to these religions to hold open services and to invite the general public to witness their festivals and rites. These religions do maintain a distinction between clergy and laity, but even the laity tend to enjoy reaching out to educate strangers in the ways of their deities. A by-product of this cultural approach to religion is that these religions may produce a large and colourful array of devotionary statuary, prints, and holy cards for distribution to all interested parties.
Other religions express the belief that their deities may only be approached by adherents who are born to a religiously-accepted family and/or who have undergone a specific form of personal initiation, such as a baptism, consecration, conversion, ordeal-trial, and/or some other rite performed under the auspices of licensed clergy. They may believe that their deities only answer the prayers of supplicants who have made specific commitments to the religion and/or they may believe that outsiders who approach their deities will either find no succor or, in a worst-case scenario, may be harmed by "dangerous" deities whose energies even the faithful can only partially control rites of appeasement, including the "proper" offerings.
As an experienced root doctor who consults with a world-wide clientele -- especially via the text-based internet, where anonymized names and the lack of vocal inflections makes it impossible to determine a person's religion -- i personally take the stance that it is not in the client's best interests to prescribe that a person seeking MAGICAL help be directed toward a RELIGIOUS solution, other than that of the religious culture in which the particular magical forms being described are embedded.
Why? Because it is not respectful to the client's own religion to assume that he or she must adhere to my religion, and because explaining a religion ON TOP OF explaining how to perform a particular magical spell can be time-consuming and distracting. If a spell has prayers in it -- and many do -- i will always explain the religio-cultural origin of the spell and state that thus-and-so are the traditional prayers said. If there is a specific spirit or deity associated with the spell, i will explain that too. But most hoodoo spells do not include set routines of prayers.
My role is to help people learn magic, not religion. Additionally, since about 90% of what i teach is hoodoo and hoodoo is about 90% Protestant Christian in cultural origin, i make my task easier when i do NOT try to lead seekers of insight into hoodoo on long journeys into comparative religion, UNLESS THEY ASK. That is, i assume that 90% of my querents will be Protestant Christians, and i will speak from within that religious paradigm, unless asked to step outside it.
Of course, although magical techniques and belief systems do not exist independently of the cultures in which they developed, and those cultures host a variety of religions, magical techniques and beliefs are not the same as religious beliefs and, for this reason, there is a long history of transplanting magical spells from one cultural community to another, effectively transferring them from one religious belief system to another.
Thus we see hoodoo practitioners using Taoist feng shui mirrors and placing "lucky" Hotei Buddhas on their altars, or showcasing the repainted version of Lindberg's famous Swiss Catholic Guardian Angel image as an African American angel in a Protestant context. Likewise we will see Tibetan Buddhist craftsmen making magical amulets in which they embed the bone carvings of people from the animist Naga tribes of the Burma borderlands amidst elaborate Buddhist iconography, even though the Naga people are not Buddhists.
I hope that helps put things in context.
If you are looking for a Hindu deity to incorporate into you hoodoo-based Crown of Success presentations to a group of bosses, i would suggest that you work with either Ganesh or with the typical three-member group of Ganesh, Lakshmi, and Sarasvati.