Quoted from awesome1:6.5° ~ 7.0° is generally the "sweet spot". Generally the front leveling pads as short as possible and the rears almost as tall as possible.
Make sure you keep the playfield and ramps cleaned and waxed and that will help increase the speed and make the ramps more makeable.
The ramps on my DP are never a problem to make all the way up on good shots.
I settled on 6.8, but I'm not entirely sure what the "sweet spot" is yet. AT 6.5, the shots are easy to make, but even with the outlane rubbers on, constant cheap drains. At 7.0, the shots were mostly fine, but still too many cheap SDTM drains. I'm hoping 6.8 will be a happy medium.
Is there a relatively safe area of the playfield to go for when just trying to keep the ball alive before regaining control? This game can be frustrating because the slings tend to often shoot the ball right to the outlanes, anything near the center hits Lil' Deadpool and drains down the middle, on the right it's easy to brick a shot or get a slow roller down from the katana lane, and the "Dead" and "pool" standups tend to ricochet the ball into a drain or down the middle.
I keep hearing how this is an easy game with long ball times, but I'm not having that experience. I thought it might be the slope, but changing the slope didn't make it any better. I know I'm not great at pinball yet, but I feel like I'm having less frustrations on a variety of different machines I'm playing on location. This game is starting to feel unforgiving since I'm not making much progress. I know it's been criticized for being clunky, and I did play it a bunch on location before settling on it as my first machine. I felt like I was starting to get better, but now I feel like I'm getting worse and even more frustrated. I assumed that I would make steady progress after owning it, but I've kind of hit a wall. I'm better at ball control, aiming shots, and even a little bit of nudging, but my scores don't reflect that. Any advice to make progress would be greatly appreciated!