As for getting in, trailblazer on its own is pretty bad cos if its terrible priority but I assume you’re using normals before hand. I use standing medium or heavy kick into trailblazer mixups or fission depending on the spacing to close the distance.
Once you’re in, you can also frame trap with different versions of the third degree target combo. The last hit of the light version is +3, the last hit of the medium version gives you a frame trap if you do a medium fission after it and heavy fission is +5 but it’s pretty slow. Combine that with fission fake outs and pyro bombs in neutral before hand and your grab mix ups can turn into some serious damage.
Also try to build potential damage with the inferno enders. You can keep PD going with a blocked inferno special if it’s starting to drop. The fired up version or the shadow version are pretty good when the opponent has no shadow meter to go through it. Potential damage will make the opponent afraid of having a short combo that leads to a level 4 ender done to them which will make them easier to open up. When you get an opener they will most likely do a quick combo breaker which you can then shadow counter or make them lock out on once you get your manuals down.
As for enders, if you can push them to the corner use the wall splat ender + trip + bomb them for a hard knock down that leads to more pressure.