21/15
7 PS
7 IF
5 WM (146 1h-prof at level 30, or 120-130 and the rest in something shiny)
5 shield
5 athletics
As an upside, the build works with almost every 1h weapon, which includes the blunt mid to top range.
Imho 15/21 is best used with light gear and a short spammy weapon (steel pick) and moving around peoples' blocks. Having tested both, I favor my normal build of 21/15 hands down, simply for survivability.
And those that claim "but you have a shield, you don't need armor or ironflesh" have simply not been teamhit or shot by missiles nearly enough to say anything. ;)