Need help with range to 2h combo

Ok i see this alot but how do people land 2 hits when they switch from rune scim to r2h. I want to do this and i think it would help increase the amount of pks i get. I always switch but my 2h is really late, any help is appreciated.

 

practice on monsters.

its about timing. i think optimum time is just before scim hits, so you still get that scim hit but your 2h is out for a quick next hit,

if your too late its too slow
if your too early you change to 2h and just stand there.

it is alot easier if your opponent is equal or lower lvl so you can 1 click them.
2 clicking is a bit slower. also a quick comp helps

Edit - also you might want to get this moved to rs general, its not cheating and you'd get more help there.