Hardest F2P Monster

Hey guys, I've been bored lately on runescape, and have wanted to challenge myself to defeat something in f2p, seeing as I have no money right now for P2P!
Now considering I said F2P, it will obviously not be that challenging, and elvarg does not count considering you can only fight him once unfortunately. Leave your opinion on the hardest F2P monster or hardest F2P challenge! Or maybe group multiple things together to make your own challenge!

 

I used to have fun challenging myself fighting lesser demons with only a rune scimitar. Might not be a challenge anymore but that's what I remember doing. Is becoming a member completely out of the question? What's your combat level?

 

Are greater demons near graveyard/bh still f2p?

 

Combat level is 154, I'm 99 mage and only 52 defence, once summer starts up again and I have a job, then I will be able to buy membership! But sadly, yes, the hardest monster I think are lesser demons, which are nothing xD. And BH, haven't been there since it was a pking arena type of thing!

 

pretty sure lesser demons are the hardest f2p monster currently

 

Lesser demons aren't the hardest f2p monsters. Go in the Forinthry dungeon in the wilderness and try to kill a revenant knight. There's a lot of monsters in there so check it out.

 

Elvarg

 

Yes I agree with Cruellex it's Elvarg

 

^^
OP says that Elvarg does not count. Thus, the toughest monster on F2P will be the lesser demon but if you really are looking for a tough fight then you can challenge other players in the wild.

 

Revenant Knight - Level 140
Hellhound - Level 132

Those are the two strongest as of now (don't think people have realised that we are in the EoC section).

 

Chaos ele i think