Advice on Prayer, Summoning and Magic training

[Nhs_Xc]

Hello all,

I would like to get 99 Mage, Summ and Prayer this summer but I am very poor. I have a couple of ideas about how to go about this, but I'm not sure which is more efficient. I'm thinking about either doing slayer as my primary money maker/charm generator, or soloing a boss monster for money to barrage rock lobsters and train prayer.I haven't really been playing over the past couple of years so I haven't been keeping up on the latest trends in training/monemaking. Thanks.