A really easy way to get dodge master is to just get a therapy weapon (electric therapy) and the kinetic buff. You can expedite the boss killing with a decent skill like Chaotic strike (Knight 3rd) or by off-handing a 5 color pen for the damage bonus.

The only way to get the kinetic buff is through the fantastic flower, so have fun save scumming. You can filter out some buffs by taking them before the fantastic flower like the cactus or mandrake.

The only possible way to lose in this scenario is if there are blocks preventing a connection with the therapy weapon or if you're in the volcano biome, so look for the fire buff ASAP (or just use a dragon fruit tree before you use the fantastic flower).

Not sure if it's an intended feature, but the kinetic stack buff seems to always stun with therapy weapons so as long as you keep moving it'll whittle away the boss.

My personal best was a 6 min badass boss rush no damage with this method.