Some of the spirits of the Lesser Key have the ability to destroy dignity. Could you use those spirits to knock down a rival a few pegs? I suppose so.
There is a deeper place to go. A place few are willing to go. However, if you consider yourself a true spiritual person and you've done nothing like I am about to suggest, perhaps dignity is an issue.
We all do things we are not proud of. We all try to hide those from time to time. Sometimes we are successful and others never know. Very often people know what we've done. They either know from instinct or facts or from just knowing us. The problem with dignity is we assume we have it when all we have done is fool ourselves. All of we have done is deny ourselves self-knowledge. We have denied ourselves a true relationship with those we love. All by working so hard to maintain false dignity.
So conjure one of these spirits. Ask it to reveal not only to you but to the people that matter whatever you are hiding that is in the way of your spiritual growth.
Trust me. IT WILL SUCK. Long-term much will be gained. There is greater dignity in not hiding who you were. I said that in the past tense. For some odd reason, it truly does become who you were. You will no longer be false. You will be one step closer.
EDIT: After publishing this, I was filled by a sense of foreboding. This is not for the newby. This is for people that have done some solid theurgic work for some time. This is no place to start.