Runescape Help And Guides

I need some help with runescape clue scrolls?

minotaurs are good for lvl 1 scrolls. jellies and h-hounds are good for lvl 3. but im a mid lvl and cant kill the lvl 3 droppers and lvl 1s dont give good rewards so does anyone know a monster that frequently drops lvl 2 clues?

Level 2 Clues are more complex and often feature Co-ordinates. Players can occasionally get trimmed Adamant Armour from these clues. Level 21 guards are the lowest level NPC to drop them. These are the clue scrolls that can be purchased from Trouble Brewing for 5000 Pieces of Eight. Players can also get them from the Managing your kingdom minigame on Miscellania from caskets, obtained by having subjects fish.
http://runescape.wikia.com/wiki/Clue_scroll

Here is a list of clue dropping monsters.
http://runescape.wikia.com/wiki/List_of_clue_scroll_dropping_monsters

45m+ drop video, clue scrolls runescape