If you know you're going to backdoor in, you'll just configure Sleaze as your higher attribute.
Also remember that it's possible to swap values across devices, so long as they were greater than 0 to begin with. So your Attack and Sleaze don't have to be within 1 of each other. For example, maybe you're a decker who had fantastic good fortune to get your hands on a Fairlight Excalibur (A/S 9/8, Matrix Attack Rating 17). But for whatever reason, you only have a rating 1 Cyberjack (D/F 4/3, Matrix Defense Rating 7). Maybe that's more mAR than you really need, and you plan on being stealthy so you will be reconfiguring your attributes anyway. You can swap Firewall and Attack, and end up with A/S/D/F 3/9/4/8 which will reduce your mAR to 12 but it also increases your mDR to 12. You'll probably be wanting that Firewall swap in this case anyway, even beyond the consideration on impact to mAR and mDR...