Method 1 (Red Portal Lure):
Step 1- Go to Clan Wars
Step 2- Get a good amount of stuff from your bank
Step 3- Wait for a victim
Step 4- When a guy comes trade him and show all of your stuff
Step 5- Say that you're quitting RS and for him to kill you
Step 6- Run into Free-For-All (Dangerous) and either have a a team ready to kill him or have ancient magicks ready and freeze him then KO him for his stuff.
(this Also works if your low level and say "kill me for spec"