At idle power the escape slides closest to the engine intakes are safe. Above Idle there are no guarantee's. You will notice on some wide body types, the slides closest to the engine intakes are canted slightly forward to ensure evacuee's are dispatched at a slight angle away from the engine intakes. The danger of ingestion is far worse than the danger of of jet blast, but this is also considered at idle power. We used to teach CC not to open doors forward of engines if they were running but we changed it in light of the engine intake danger footprints being safe for this condition. We were essentially pre blocking useable exits. We also used to teach CC to shut down engines if they were running and FC were incapacitated. That changed too and is no longer done. I'm curious how many operators teach CC the quite basic task of shutting engines down if they need to before initiating an evacuation.
Sorry for so many questions but I am quite curious for my own research in procedural design as to who does what and why. The industry really needs, and lacks, any internationally accepted standards of CC EP procedures.