1. Sunil Narine
Sunil Narine is having the highest economy in the T20I World Cup event of 5.17. Out of his 12 World T20I appearances, Narine conceded just 231 runs and took 15 wickets. In the 2012 World Cup, Narine's role was crucial in winning the cup for West Indies team. In their final against Sri Lanka, Narine took 3 wickets by conceding just 9 runs and the performance was decisive in winning their maiden World T20I title.
2. Samuel Badree
One more West Indies spinner in the list. Badree is having a T20I World Cup economy of 5.52 and took 15 wickets for the team. Rather than being a prominent wicket taker, Badree forced the batsmens to defend his balls. The right arm bowler performed 59 overs in the World Cup event and conceded just 326 runs. 4/15 performance against Bangladesh in the 2014 World Cup was his best performance.
3. Daniel Vettori
Former New Zealand skipper, Daniel Vettori is having a good records in the T20I World tournament. The left hand spinner conceded just 392 runs from his 67 overs with an economy of 5.83. Vettori took 17 wickets for the New Zealand side. 4 wicket performance against the West Indies team in the 2009 event was his best tournament performance. Vettori had a strike rate of 20.1 in the World T20I tournament.
4. Nathan McCullum
The New Zealand all rounder, Nathan McCullum stands 4th in the list. He is one of few spinners who can bowl with the new ball and puzzle the batsmen's. From his 22 World Cup outings, Nathan bowled 67 overs and given 399 runs with an economy of 5.94. His World Cup best performance was 3/15 and had a strike rate of 17.5. The right hand off break took 23 wickets for the Kiwi's in the World T20I tournament and was one of the best all rounders.
5. Ravichandran Ashwin
Ravichandran Ashwin is having an economy of 6.18 in the World T20I events. The right arm off spinner performed 15 matches in the tournament and bowled 54 overs. His 4/11 performance against Australia in the 2014 event was his best performance and was crucial in dismissing the Australian batting order at just 86 runs. His carom balls were one of his key skills and the most feared bowling action in the T20I matches. Ashwin conceded 334 runs in the overall tournament.
6. Angelo Mathews
The Sri Lankan all rounder and current skipper had excellent T20I World Cup records. He is the only pacer in the list and having an economy of 6.47 in the tournament. Out of his 29 World Cup outings, the right arm medium pacer bowled 29 overs and conceded 481 runs. 3/16 performance was his best in the event. Mathews took 19 wickets for the Sri Lankan team in the overall tournament and is having a strike rate of 23.4.
7. Graeme Swann
Graeme Swann is known for his excellent finger spinning qualities. Heavy spinning and drift was his core strength. The right arm off spinner had an economy of 6.50 in World T20I events. He was part of the 2010 tournament winning England team and had crucial role in balancing heavy run flow in the middle overs. Swann bowled 55 overs in the tournament and conceded 358 runs. His best performance in the event was 3/24 and took 22 wickets for the side.
8. Samiullah Shenwari
Although Afghanistan wasn't a successful team in the T20I World Cups, the team has produced some spin talents in cricket. Samiullah Shenwari one of them whom can do wonders with ball and bat. The right arm spinner is having an economy of 6.60 in the World T20I's. Shenwari debuted his World T20I in 2010 and played in every tournament after that. From his 14 matches, Shenwari bowled 43 overs and conceded 283 runs. He wasn't a great wicket taker with only 5 wickets in his World T20I stat.
9. Shakib Al Hasan
Bangladesh skipper Shakib Al Hassan is having an economy of 6.64 in the World Cup tournaments. He was part of the World T20I events in all of the 6 occasions. From his 25 matches, Shakib took 30 wickets and having a strike rate of 17.6 in the tournament. Shakib's 4/15 performance in the 2016 World Cup against Oman was his best showing in the T20I World Cups. From his 88 overs, Shakib conceded 586 runs. He is also one of the most trusted all rounders of the side.
10. Ajantha Mendis
The mystical spinner from Sri Lanka, Ajantha Mendis is placed 10 in the list with an economy of 6.70 in the T20I World Cups. From his 21 outings in the World Cup Mendis took 35 wickets and was the highest wicket taker of the 2012 World Cup. 6/8 against Zimbabwe is his best performance in the tournament and one of the best overall. He was part of the 2014 tournament which the Sri Lankan team had won and took 4 wickets in that event. Mendis bowled 78 overs in T20I World Cups and conceded 526 runs.