There cannot be a gap bigger than 20 average skill points between the 3 skills areas Def/Att/Phy.

Just add cones to the lowest skills area (Def or Att or Phy) and the next time you can add cones to the high one again.

But!

Best not to go there all together, and have a total Attack or defense player, you will peak and than never return... word from the wise...

Peace.