In the Twenty20 format there is no scope to be slack in any of the three departments, be it batting, bowling or fielding. If a team still manages to end up winning despite being mediocre in one area, then it should be considered as a lucky day. (Full Coverage|Points Table)The Royal Challengers Bangalore (RCB) elucidate the above point quite well by ending up as the losing side more than often due to a weak bowling attack. RCB for the past two seasons have been batting heavy, but in this edition injuries to Mitchell Starc and Samuel Badree has hampered their bowling department. (Also read: RCB’s Adam Milne ruled out with hamstring tear)Bowling a let downIn the absence of their key bowlers, RCB’s bowling attack is exposed and they have nowhere to hide. Moreover, skipper Virat Kohli and team management in an attempt to get the right bowling combination have ended up making changes in almost every match. (Also read: RCB can still bounce back, says Chris Jordan)It would be unfair to say that RCB don’t have quality bowlers in their ranks at the moment. Adam Milne, who is also ruled out due to a hamstring injury, never featured for RCB after playing his first match of the season and same was the case with David Wiese. Shane Watson has been doing decently well with the ball along with leg-spinner Yuzvendra Chahal. (Also read: Royal Challengers Bangalore host Rising Pune Supergiants in battle of strugglers) Top heavyadvertisementThe batting tells a different story for RCB having scored 150-plus in all of their seven matches they have played so far. Kohli has been in scintillating form with 433 runs, which includes a century and four fifties. But it has been the bowling that is letting down the Bangalore-based franchise.In their last match against Kolkata Knight Riders, RCB had everything in control defending a total of 185, until few lapses on the field and poor bowling came back to haunt like a nightmare. RCB conceded the advantage and the big-hitting Yusuf Pathan and Andre Russell ran away with the game.Luck gone for a ‘toss’In this season the trend of chasing a target has been successful but Kohli has not been lucky with the toss either, with RCB only getting to chase once against Sunrisers Hyderabad and falling short by 15 runs. Having a destructive batting firepower and Kohli being a batsman who thrives while chasing a target could just work well for RCB and more importantly cover up the bowling lapses. But RCB can’t fancy to chase everytime and for that to happen, Kohli needs to win tosses.RCB have tried out every other bowler available in their arsenal and don’t have much time to extend the trial run. Rather, the focus from the think tank and Kohli should have horses for courses approach and give them the confidence to bowl at their best under pressure.