As it is known that boiling the tea for a quite some time extracts tannins. But, that is the only way I know of making strong tea.  Cup size: 150 ml.  I put 3/4 cup of milk and 1/4 cup of water in a vessel with 1/2 tbsp of tea and 1/2 tbsp of jaggery on a slow flame, and let it boil for some time.   What is other way to get a strong cup of milk tea?  Is there a way to get a strong cup of tea without boiling tea at all?  This is the tea I use:  http://www.tataglobalbeverages.com/brands/tea/tata-tea/premium  These leaves are totally crumbled.  
I found the solution which suits me:  I first boil the milk, water, and jaggery together in quantity mentioned in the question. After the mixture reaches boiling point, I switch off the gas stove and throw in 2 table spoons of tea. I close the lid of the vessel and let the it sit on the gas itself for 6 minutes.  After 6 minutes, I strain the tea and the result is a non woody strong hot tea.  I think it is important to let the covered vessel sit on the gas because otherwise the tea will cool off in 6 minutes. 