It's normally just to finish off the build to take round out all of it's weaknesses. thats how Kripp makes his stuff, just keeps working on a build till he irons everything out and adjusts his play style to account for anything that remains.
so if you got as far as you have, you can just keep going and play it in your own style

dont have to go 100% cookie cutter. im actually going with a duelist physical sweep build based off his templar build

also having lots of fun ^^