There is a touch of being a manglik due to the presence of Mars in the 4th house. But more than that you have a Pravarjya yoga with 4 planets in the first house as per Bhava Chart. You must have a proper matching horoscope if marriage has to be successful.
No. Astrologers do invent new formulas to cancel Mangal Dosha which does not exist. Mangal means good and how can it be a dosha. Strong Mangal indicates vigour, strength, commandeering abilities etc. And in marriage it represents sexual potency. You are asking for cancellation of all such good things. Do you really want it?