I am new to speedrunning and this is the first and only category I'm playing. I'm about 20 runs deep with a PB of 2:54 and I feel like I now understand the route as a whole pretty well. From what I'm seeing online, working on boss fights and also some mob fights will serve as the biggest time savers. My question to the optimal runners is; what strats make the biggest difference in the overall time as opposed to not doing them. There are plenty of battle & platforming strats that intimidate me, which I haven't worked on or maybe even tried yet, but I don't know where to start. What are the biggest game changers? How can I get this 2:54 down to a 2:25 with the least practice? I know the answer to this is highly personal to the runner but I'm sure there are some commonplaces at this point of improvement. Thank you guys in advance!

Note: One thing that I know I need to work on is Simba, particularly colosseum world terminus and final rest. Everytime I try to execute the roar's correctly I get interrupted by heartless somewhere and lose a million seconds. help a brutha out