I already have a Fighter 5 /Wizard 1/ Bladesinger 15/ Divine Champion of Corellon Larethian 4. Nice one. Can do over 300 points of damage - if the enemy has a very low AC, so I can use Power Attack to the may. OK, that doesn't happen often, but once it did, we were fighting a Genius Loki (the critters have AC 0). In order to avoid getting hit, I used the "Bladesinger's Spring Attack" (being hasted, tumble there, then make the full attack with Song of Fury, resulting in 5 Attacks. As the free bladesinger spell, you use Dimension Door to get away.)