been playing with the blackhole resets for a while and i think their is some real potential with them.
with the rest i did 53-54% with jumpins (20% before blackhole, 33-34% after).
this is from the b+1 string, but also works with the B+2 string. but NOT the 2,1,2 string (requires a different setup)
naturally they can escape with certain specials and rolls/jumps. but then your are at optimum distance usually for zoning again (unless its a advancing special with armor/projectile immunity) which means its pretty safe pressure that threatens the persons health.
i like to do b+1,2,1,4xxblack hole (d,f+2) shadow tackle, njp, 1,2,ex upknee, shadow tackle/teleport. tackle to start zoning, tele because it places you at the perfect range for b+1 again to keep pressure.
near the corner? switch that b+1,2,1,4 to b+1,2,f+4 for a low that leaves you at advantage and start your corner game, they almost never see it coming unless they have played a lot of matches vs you and know the strategy by now, in which case do the normal string for the overhead and begin your juggle FASTER!
212 is where the mindgame comes in imo because the goal isnt so much to net the hole outright but to make the person second guess.
212xxblack hole (d,f+2) lands on top of them, but you cannot follow with tackle as it will tackle them out of the hole. slide works but its punishable with jumps if they are too close. d,b+2 puts it between you and him. say if you have a char like sub with wakeup slide, if he does it he will go into the portal every time. put it behind you (d,f,b+2) for wakeup teleports or jump backwards so if they rush too fast they may eat the portal (havent tested this one yet tho).
the use of ex black hole as a surprise vs turtlers/projectile trades cannot be underestimated as it more often then not catches them offguard.
oh and one good thing about d,b+2 after 2,1,2 is if you follow it with a upknee to stuff most incoming that might avoid the portal and they still wakeup into the portal you recover intime to do a blackhole combo, tho maybe not a njp at the beginning in which case 1,2xxupknee works, f+4,3 works, f+3,3xxupknee also works.