Hi Soumya,
Couple assumptions :
It seems that multiple developers are modifying the same elements in Studio pro in different branches and when you merge, conflicts occur. If that's the case, you need to work on your branching strategy and discuss within developers and figure out a way to not work on the same page/microflow/nanoflow etc. Please do the merging and conflict resolution from within the Studio Pro as well as much as possible. AFAIK, it's only CSS conflicts that need to be fixed outside Studio Pro using TortoiseSVN.
It would benefit you to have smaller microflows/nanoflows and use sub microflows / nanoflows as much as possible, which makes it easier to collaborate with the team. For pages, use snippets if useful and wherever possible.
Hope this helps.