That's largely because they are underplayed. Most people play them like a Giant Bashspec with 50+ speckled pills, but they are that and more with their unique skillset.
As for the success rate? 17/25 = 68% :
1 of 2 breaks successful
[
www.qhcf.net]
3 of 4 breaks successful
[
www.qhcf.net]
1 of 1 breaks successful
[
www.qhcf.net]
1 of 1 breaks successful
[
www.qhcf.net]
0 of 2 breaks successful
[
www.qhcf.net]
1 of 1 breaks successful
[
www.qhcf.net]
1 of 1 breaks successful
[
www.qhcf.net]
1 of 1 breaks successful
[
www.qhcf.net]
1 of 2 breaks successful
[
www.qhcf.net]
0 of 1 breaks successful
[
www.qhcf.net]
1 of 2 breaks successful
[
www.qhcf.net]
0 of 1 breaks successful
[
www.qhcf.net]
6 of 6 breaks successful
[
www.qhcf.net]