First let's start off with how power is calculated.
10 soldiers=1 power
25 workers=1 power
1 conquer=1 power
Therefore the fastest way to gain power would be to armor spam units but it is certainly not the best way. The best way to increase power would be by getting conquers and increasing your worker count. To increase your worker count hunt down wrecks and ops, wrecks in hopes they will contain workers and ops because you can raze them for not only workers but resources as well. Not to mention that as you increase your worker count to gain power you will also be increasing your income. Another fast way would be to go for conquers, each conquer will give you 1 power as well as increasing your worker income every 24 ticks.
u forgot 1 res OP = 0.2 power to each member