Be careful
In regard to power, you have to be careful with how interpret the formula. As power is work/time, it is obvious that the quicker you do the lift the more power you exert. But that doesn't result in any extra gain as the same amount of work is done. So don't go out trying to lift as quickly as you can just because it means more power.
For example, if you were to bench press 100 kilograms the metre length of your arms, then the work done is 980 joules. If you lifted this in one second, the power is 980 Watts. If you lifted it in two seconds, 490 Watts. Same energy, different power.