We should always have five regular bowlers. Only then can we go for the kill. Part time bowlers like Sachin & Sehwag can be used to break partnerships and not to fill in the full quota of 10 overs of a regular ball. Too many times it has happened that after initial breakthroughs, the opposing team has been let off the hook when a part time bowler comes on. The opposing team's batsment then get their eye in and consolidate. Teams that get rid of the opposite team for low scores are invariably those which have at least 5 regulars bowlers.