I've been using the slant with IPs, and I actually find that I get a more gentle shave than I did with my HD. And the shave is closer too of course. I absolutely love this razor.
I team 'em up. Slant for 1st 2 passes, HD for 3rd pass and touch ups. Works great for me. You can throw a gentler blade in the HD, there's not much left for it to mow at that point.
Klaus has it. The Feathers work best in milder razors. Day 2-3 shave is better than Day 1. I use Derby, IP, Crystals and Sharps in the Slant.
I team them up too. But I tend to use the Slant for the ATG & finishing, and some other razor for the WTG and XTG passes. Go figger. YMMV.
My Experience My Slant put my Futur on the shelf. I found it much easier to handle. My shave is better and my technique has improved. Coming to think of it, that may be why my shave is better. Anyway, though I'm still working my way thru a sample pack, I've found the Feather/Slant combination works best for me. As previously mentioned, caution must be taken with this setup as it is very aggressive. A little carelessness will result in severe damage. Don't worry the shakes will subside with experience. I'm just kidding. Just take your time and concentrate on angle and pressure and you'll do fine.