Additionally, for Trollheim It is recommended to have rocks climbing boots, just in case, and should you plant more than two RS gold varieties of seeds, you should always go with your top or most expensive. lol seriously if he has an account and is powermining on living rocks with the difference in 16 levels, u seriously have no chance , however if he's plans to powermine iron to 99, he'll likely get up to 99 dung before.
16 levels are not an amount of exp that is below to the level of 70's. There is a need for 77 mining levels to obtain concentrated coal, and you need to bank it, not powermine. Gold concentration is level. If he's got one of the dragons and it's a close race imo. It's not likely that the rates of exp will be different, however if you have a strong team I'm convinced you'll be able to make it first.
Yes , it's a lot of xp due to the fact that dung is slow at lvls below 70. plus powermining is alot faster thats why i said he has zero chance of success if operating at level 70 is below 1 million exp, you have to accumulate 13 million exp in order to achieve 99. The first 1m (even in the first 6m tbh) does not make one point, once cheap OSRS gold you reach 80 mining the miner has reached his optimum exp rate which is under 100k an hour.