While this Golgari commander gives you access to black's excellent removal spells, you may want to run some punch or bite green removal spells to have your spiders deal damage without engaging in combat
It still adds some personal flavor too, using typefacing and a Phyrexian to get the point across
Second, once you have a good grasp of the cards you like, try to understand how many of those cards were actually relevant to winning, or whether you lacked any particular cards
Working your way up to a Portal to Phyrexia sounds great, but turning a Treasure token into a Sol Ring aint too shabby either
It only makes sense to me to really push the themes that we love and to focus specifically on what makes those cards work
What I want to do is to make my deck small with surveil and then shuffle the good cards back and keep casting Vraskas Contempt and Sinister Sabotage over and over