Mining bonuses for perching ( sitting static)? No
If im in a WH, hugging, the sleeper/awakened rats wont catch me at full speed.. if they catch me though, my prospects will be toast. Ill also get toasted by another player that scanned me down… Its why i dont perch in WH space. (uncloaked)
'In High Sec. often solo players with perched ships mining ice are afk/ or semi afk mining. They know that if the rock completes, they will shoot out in to space since they are not orbiting anything now. ( they could orbit a bookmark, but thats a bit more advanced i guess)
As for multiboxing fleets of exhumers. you have a few things at play
-Distance is an issue and orca sieging for compression locks it into a spot, so keeping max distance to the farthest rock is key. to minimize multitasking… in an ice patch hulks can get the whole thing from a specific point in the patch. thye might be static holding at 1000 or orbiting using fletet regroup command.
Multitasking - its a thing especially when running hulks (unless you are cheating with bots) I can tell you from experience, running 10 hulks, an orca, and a hauler has it moments and requires concentration and coffee. not moving around that much helps that process. If I want a break, i pull out the macks… its light duty compared…
Transfering load - keeping close to the orca maintains a connection to the fleet hold of the command ship allowing seamless transfer of product off the ship to the orca. its more crucial when operating multiple hulks
Alternate mechanics - Some gankers like to bump orcas. Some multiboxers just get irritated and leave, but theres another way. a maxed sp orca pilot can command boost from far away, and fast drift the ship while running compression which makes bumping that ship a bit more irrelevant because its stil providing the benefit…. meanwhile, if you are running macks or skiffs, you simply 500 orbit and collect.. bumping is much more difficult and the ships suck backk in like a magnet. compression now can be hot-keyed under general.. so you spam ( i use “C”) until the ship is chock full… then warp to pos drop and return.
Ganking - There are a lot of factors here that hurt or mitigate circumstances but theres a ton of threads here on that topic. Simple answer is that running hulks is like rolling a muliplasmid.. results vary.. macks are similar… Skiffs are fairly safe with the right fit and fleet support boosting shields armor etc but they can still die to motivated gank fleets. even the orca can go.
My Suggestion, if you solo mine, orbit. Make a book mark and orbit that. movement creates transverse velocity to help mitigate an attack, also helps deter cloaked gank spotter from fleet warping death on top of you. If you have a fast endurance, make a “safe bookmark” 200km away then return to mine… keep location open and spam S or D to that spot if the bad man comes. ( minimum warp is 150km, but you may push closer to that as you migrate to different rocks, to warp safe you have to stay outside of 150km from the bookmark ) warping to safe and not to dock, helps you observe the situation on grid. my .02
If you run fleets, you know the dangers.. use intel, use local, bring the right ships to areas considered dangerous.