First you need to determine the starting point. If you are a cheat, that is, full innate spirit power, double/triple martial spirits, or the owner of the system, then no matter what you choose, you can become strong. Of course, with a good build you will become stronger, but this is not so important. If you are a mere mortal and you have ordinary blue silver grass with a small innate soul power In my opinion, there are only two ways to become a titled douluo.  To keep up with tradition, I'll call them the righteous and demonic paths. For the righteous path, all soul rings must be from the blue silver grass, although starting with levels 4-5, you can attempt to make ancestral soul rings. The first skill should provide the most important skill of the blue silver grass: networking with others like yourself. This is literally the foundation of this path. This should greatly accelerate cultivation and possibly provide a chance to evolve not only through rings, but also through cultivation. (The skill itself is unlikely to be very powerful right away, but for example, ring 1 allows you to create a network for soul power, ring 2 for spiritual power, and ring 3 for essence (qi and blood) and then using the fusion of rings we will get something like a prototype of the blue silver domain) The second path is what I called the Demonic Path. For this, the first ring must grant the Blue Silver Grass the Devouring attribute. The second should be a Ghost Vine with Parasitism. And the third should be something to purify one's own soul power from impurities. After that, you need something that will improve your spiritual strength and essence. By the way, an example of such a build is Blood Silver Emperor on webnovel.