You don't give much information to go on. Is this switching or is it a linear dump regulator?
For switching the Tip3055 may be reasonable. For linear operation it is a pretty poor choice compared to a decent hometaxial 2N3055, the planar versions are not so good for linear but for your needs you will not see second breakdown ( don't worry if this means nothing to you, not all 2n3055's are made the same way).
As a linear regulator the 2N3055 is a bit limited, I prefer 2N3771, but you can make small dump regulators with one device. For higher power you need more in parallel, but just connecting the 3 leads directly together gives you little gain as they will not share current unless you do something to force them, such as include resistors in the emitter or base circuits.
If you are trying to switch then mosfets are far better, but if you have heat sinks available at low cost then bipolars as linear dumps work very well and don't have the radio interference problems associated with switching pwm.
2N3055 is limited to about 60W per device, with practical heat sinking, but if you choose a suitable series resistor you can dump 240W as the dissipation in the transistor is 25% with half volts across the resistor. Avoid the Tip3055 for linear regulators, the don't like handling much of their claimed 90W rating.
Flux