What I did 2 years ago, collected all the seaweed possible, form any location, preferred was close to barbarian shoreline, doing in 300 piecemeal. cook them at thieves training, gather 300 buckets sand at Yanile. make my glass normally was falador, but recently is a bit closer at Zanaris, 1.3 clicks bank to forge, and back. Then blowing the 300 orbs. the closest orb location to convert if you wanted was edgeville dungeon to the I think, Fire orb. Like I said, been a couple years since doing that. Making orbs is fairly decent and can shorten that by buying the seaweed in amounts you want. as for the sand, buy up enough buckets from garden stores, and go to Yanile, super close to bank, 2-3 clicks and return.