New fiddlesticks player, is it ok if I use absolute focus

So I have been practicing my clear, and for the life of me I can only do the krugs trick with absolute focus. Using the inspiration tree I just can not kill them without it running on like 40 hp. Even doing the auto trick over the wall.

Am I setting myself back using absolute focus as my secondary? Im trying to learn and can clear with ease using it, I just can not for the life of me get that last tick otherwise =(