spencer is pretty brain dead, basically, once he gets going he's going on auto-pilot, more so than most characters, you can actually handle similarly to how you would zero except a bit easier as spencer doesn't have projectiles or the obnoxious mix-ups zero has, just watch out for good ones, he can kill every character starting from 1 meter (like vergil can), and yes you can air throw his zipline, just don't do it online, it's like zero's j. H, you can throw it but you have a very tight window to do so, so not worth it
zero' j. H isn't as good as people say it is because he can't cancel it into anything except for j. S (but he can cancel j. S into buster so watch out for that), it's just an obnoxious move because of the ****ing hitbox it covers (literally...a ball around him), he's an aerial character that vajra isn't a great choice against, he has to respect the assist but his respect is showing vajra a j. H (most characters can't do this), but a good zero shouldn't just approach with j. H, with dante's jam session, zero gets like a 5 way guess mix-up, it's really really REALLY hard to block
akuma on point is good, it's just his assist is so good that it's usually better to run him second, but since akuma is running akuma/sentinel/doom, he's fine (since just about anything is good with drones/missiles backing it up)
and akuma, we'll get that match in, i gotta do hw now and then class at 4:30 EST, so maybe if i'm done before then we can get our little set in (but highly doubtful)