We envisage Religare to be in the league of premium corporate houses like Tata Sons, Reliance, Birla in the near future. Unison of media activities under the corporate house delivers high ROI. All big corporate houses are parking large pie of advertising investments in media buying, so all corporate houses control it by themselves. The biggest expense on the balance sheet of an organization is of advertising, & media buying is the major chuck of the outflow of money.Hence, Centralised buying makes the problem of controlling large budgets easier for the marketing director. As all the high expense activities are controlled by corporate house hence centralized buying agency is the most important strategy for the brand development which is adopted by all the leading corporate houses. As it is better configured to maximise effectiveness, ensure value-for-money and help facilitate innovative and effective communications solutions
Creativeguruby corporate house
By the corporate house
by a corporate house
by their corporate house
Creativeguruhence centralized buying agency
Similar, throw in an article/possessive pls
Creativegurufor the brand development
I would get rid of the article
Creativeguruby all the leading corporate houses. As it is better configured
I don't feel that stop, that period, is necessary. A comma could do.

Cheers Emotion: smile
thanks a lot for your help