What's the best structure for a short term trader to maximize...

What's the best structure for a short term trader to maximize account growth over time?
Assuming the the main goal is equity growth whilst taking a modest income from the profits as well.
I understand this would probably depend on annual profit, but I'd like to understand how to come up with a spreadsheet to analyze the different tax structures while input different annual profit figures.

For example, say I had a Discretionary Trust, I'd have to distribute all profits in a given year right?
To avoid hitting the top personal tax bracket, could I disperse profits into a company and only pay the company rate instead of the highest personal tax rate?
If so, how does the equity sitting in the company get used to purchase new shares in the trust?