I must admit that my rule of shaving is that the shave must be completed with one razor only. Excuse my total ignorance, but is a Schick Injector a cartridge / disposable razor (genuine question, I'm not aware)?
I have recently been using the Gillette Slalom 2 blade disposable and I must say that I am not particularly impressed with it. However, I will continue to use them until I have none left (I purchased a job lot in ASDA for £2.50 for a pack of 8 razors). I then intend to try out some of the options mentioned above; perhaps the Gillette Sensor 3 and the Gillette Guard. I'm keen to get a good / reasonable shave at an economic price, using probably 2 to 3 blades versions only. And, if all else fails, I still have 30 Gillette Sensor blades left for safe keeping, which have never disappointed. Again, my personal preference is a cartridge, as there is less to dispose of and therefore hopefully a little better for the environment. My proposed trip to India to pick up some Gillette Sensor type Blades (I believe they may be Vectors) will be unfortunately somewhat postponed for the foreseeable future.