you probably saw my standing point on saki , so i'm not going to repeat myself. The point is : in the amount of time u will get 200 dcs for spica , then 100 for her awakening then at least anther 100 for iris as you planned , well it's going to take some time , assuming you area free player. Assuming you are willing to spend money on that , it's going to be a whole lot faster. Untill that time , if you're lucky , we might get a event that might include that sort of unit. If you're unlucky we might not. Regardless of the situation , the point is : just play the game and see how your team comes along. Rushing for saki is not something i'd recommand , but in the end it's your account , and you're the best 1 fit to decide on how to progress it further.