My best bet is to slaughter 300 chickens per day, and then place their bones in the sand, for 30 yrs to OSRS GP achieve maximum combat and maxed pray. However, i'm not going to wait until the end of my 40s for a bandos. I do get from 3hrs to 6hrs of rstime during holidays (except Sundays, which is when I receive 2 and a quarter hrs online.) However, i don't often get them since even saturdays...