Depends what way you want to stake on the account. Keep low strength if you want to be a boxer.
Now you have 70def, you should always dds opponents that have less def than you, to make sure your def comes in useful, People with higher STR/HP will definitely beat your def if your just whipping.
I'd suggest either training range, or PCing to get higher hp, as that is a huge advantage whilst staking.
Also the whip max hit's are every 4, and DDS max's every 6.
so pick which stats you want your self.
Example
DDS max levels; 67/73/79/85/91/97
WHIP max levels; 86/90/94 etc.