Here I have a link to one of the page which has remedies for strong mangal dosha. You can easily follow the remedies to reduce Manglik effect. One thing is to be known that many people say many adverse things about being mangalik, but mangal or Mars is not bad in every way. It is the planet of energy, courage and initiative. Except that it is also the planet of war and fighting, a person with strong mangal dosha, will be aggressive by nature. He / She will be short tempered and take hasty decisions. A person capacity to think logically gets more disturbed if Mercury is badly placed or weak. The native will think and act in haste also if Moon is weak in the chart. The blessing of Jupiter are most important for reducing Mars effect. You can read more on the remedies from the link below.