you may need also a device to hang the film from and a heavy clip to secure the film dryes flat.
Remember that the space where you hang the negs should not be molested by you walking there and making dust, nor opened to air currents dusting the neg drying.
A small and good scissors to cut the begining and end of the film, and a canister opener, both with some thick and short strap to hang from your right hand, before loading the film reel.
Has anyone mentioned a special contdawnd digital clock to mark the total dev time up to zero ? And a cheap aditional Casio black wrist clock, sounding a repeating alarm for agitation time, can be nice too.
If you want to further invest, a digital thermometer will be nice, not instead of the analog one for the liquids, but for metering the room temperature.
Personally, without wanting to open WWIII here, I don't use any Photophlo type of dryer. I dry in flowing water for half an hour, and then carefully dry the hanged neg with 2 baby sponges, that have been stored and thus further softened for some time immersed in water.
Before using them I will squeeze them time and againg, and the same after use.
Last thing about the concept of darkness. Absolute darkness is very hard to achieve, and unnecessary. But absolute darkness metered by your eye during the first 30 seconds after closing lights - will be enough. The same principles of camera exposure apply here too. thus 30 seconds darkness is more than enough.
Cheers,
Ruben