If raiding is your concern, then variety is obviously the goal. Skittleskull isn’t the best but having more than 2 for wars is overkill. We all develop what heroes we get. When I started, I kept getting multiples of heroes, so I would be leveling those up so that I can actually field 30 decent heroes. As a result, I have 2 ascended Little Johns, and another 2 at 3/60. I just never got any other 4* greens or 5* until relatively recently. Similarly with Boldtusk, Grimm, Rigard, Sabina and Hu Tao. I ended up getting around 4-6 of them before getting other 4* heroes. Luckily, I did start getting other heroes so some of the multiples ended up as feeders, but generally I had at least 1 fully ascended and 1 at 3/60. I don’t feel it as a waste as they can be serviceable war bench strength. Plus, many times we see teams who consolidate on one colored tank. Having 12-18 of the strong color means you can have an effective 6 attacks. I find that there’s always a hero to work on. At one point, I thought I wasn’t progressing, then finally get a few blue heroes which was my main weakness. Yeah, so I get the 5* heroes that people don’t think are good: Thorne, Leonidas, Justice, Elkanen, Quintus, and Obakan, but whatever fills the roster. On the other hand, I recently got Merlin and my second Proteus, so that’s good.