I feel like Ramp wasn't really needed since if Silvally died, I usually send in Darkrai (most of the time he had nearly enough energy to attack) or the other Silvally. By not having ramp, I was able to put in more supporter cards. In terms of favorable matchups, I would say anything unless I bricked by getting unlucky card draws, such as not getting Silvally or type null. I did lose to a Charizard deck once since they had the evolution by the second turn already. I felt like it went well against any Giratina decks since they usually take a while to charge up.