POMA.
My understanding is this regarding TW's death. He was crippled and weak yes, but he's still a god. 1% of a god should be immense for even the strongest immortals. I think LB or the dream god mentions that TW's divine spark was destroyed, and that the divine spark is what he formed to become a god in the first place. So without that, he gradually weakens to eventually die. The Heavens was probably playing the long game since they could not outright kill TW. Without his divine spark, TW couldnt maintain his godhood so he concocted the poma project and sent out pieces of himself to form partial clones all over poma world. Of all these clones, only 3 survived. Even then only 2 were suitable for TW's plan, or so it would seem. Heaven's found out about this plan and instead of stopping it, they tried to acquire the chaos origin physique by making MC a soulless husk or an 'angel' while still inside mom. Due to grandpa's meddling and the sacrifice of Chao and mom, MC was able to escape from both the heavens and the influence of TW during his first 19 years of life. Now whether the plan of grandpa was to save MC from TW or the heavens or from both is debatable. But seeing how TW was sure grandpa meddled in his plan, we can say grandpa atleast plotted against TW.