Moss Giant - 1/128 key, LB (4%)
Desert Lizard - Gloves 1/512 (0.8%)
Ice+fire Giant, ogre, jogre, zogre - LB (4.9%)
Mogre - 1/25.6 hat, 1/64 flippers (20.1%)
Basilisk - hat 1/512 (0.8%)

Overall account risk: 28.2%

monkaS

Daganoth can be killed on waterbirth island at low levels. Go into the cave, then leave again. Wait 10 minutes, then can re-enter and they'll have lost agro and can be safespotted easily.

It would also have been possible to mine rune essence in f2p, however trying to keep quest points to a minimum until I work out all the possible champion scroll chances