I put this off for months and I'm bored so here it is....
The term MP(Maximum plunder) for those who don't yet know is in this case equal to the most gold your build can take from an opponent in one action at any given time. You want to be at MP or your builds potential is being wasted and you might as well quit playing. You will take years to grow, while mp players starting at the same time as you will grow to twice your size in a week.
The formula below is not exact but it is not wrong I checked the calculation from workshops to titans, it works. The reason it's not exact is I over shot mp by about .5b as it's better to be over a bit than under as you will hear from anyone who knows how to use mp.
MP=5500x(attk def spy/attk spy/def)
I've heard this asked before so I will also say these are your stats, all of them added x5500=(this is the amount you have to spend in gold on allies to assure you are at maximum plunder). THESES ARE your stats only, which you are adding not your allies bonus stats to you.
IMPORTANT: when your stats change so does MP. You need to reuse the formula using your new stats to once again know your new maximum plunder needs(amount of gold spent on allies).
TIP: Once you are at mp during the process of building I found it helpful to over shoot the number by 500m to 1b so I didn't have to search for allies everyday.
Ok do whatever u like with this ish the calculation I saw before was not easy to follow... New players this is the most important growing tool u will use that's easily accessed by all players not cause of my stupid formula but because you can't grow for expletive without being mp