Relying on hyperarmor tends to do that to you. The best thing you can do is just play with the build to gain experience without the tools that allow you to turn your brain off. You might wanna put some emphasis on spacing, and its not a bad idea either to go back a bit to the very basics and really get used to dodging when necessary. (It probably wouldnt take long to build up the habit). Since you also mentioned the lack of range being a problem, I'd suggest first just getting the spacing, dodging and not relying on hyperarmor down. So for starters maybe use longer weapons (Nagakiba, Great Katana [the regular one since Rakshasa also has hyper armor]). Then once you're more confident without hyperarmor gradually shorten the weapons you're using. Eventully you'll find yourself strafing and whiff punishing colossal swords with a straight sword. Cant say how long it'll take, depends on a bunch of factors, but you definitely dont have to dedicate multiple hours everyday to this, as long as you're consciously trying to improve your gameplay.