I haven't tried Nexona in about 5 days, but last time I tried her, the adds are a little tricky.
I'm boxing as i'm a sad person with no people skills

but Nexona is one of the tricker ones to box in VP. My main tank is 8.2kac or thereabout fully buffed, and when those adds pop it's rampage/cyclone and i'm chain healing with 2 clerics until i've got them under control.
It does appear that sometimes the script is still buggy as sometimes I never get the 2nd round of adds, yet sometimes I do. When i check back parses, if the adds and Nexona get a lucky round in its more dmg than HP's and I tend to hope DI or the solo aura DI goes off to save my lil warriors ass. But sometimes my lewt tanking skills hold up and tanking them involves only a little wind in the pants. I've got around this instant wipe now by using lewt skills, and drinking more coffee while throwing in my 2nd tank with cywebtools/rampage to grab the attention of the adds.
Farcical's difficulty ratings for boxing VP:
Racnoretta - 3/10 difficulty - Any mob that casts FD sucks when boxing (Technically not a mini but FD boxing sucks!)
Silverwing - 6.5/10 difficulty - Purely because ae sucks when coh'd back to face wrong way when boxing. Otherwise seems about right, adds can be the wiper if not paying attention. Like it for all the wrong reasons.
Hoshkar - 7.5/10 difficulty - I like this one. Need to control DPS, and tanking, and ae, and adds. Nowhere really safe with the quick respawning roamer.
Nexona - 9/10 difficulty - Adds can make mincemeat in 1 round. Otherwise generic and fairly easy but annoyingly easy to wipe for no good reason other than 5 mobs just appeared & 1 rounded me. Would love to see just 3 mobs pop, maybe 3 times so at least dying wasnt left to chance.
Drusshk - 3/10 difficulty - Really cant understand this one. Very low hps, pointless AE, very much a run in kill run out. Be much better to make druushk rooted and make guards either side 1 min respawn or something more challenging. Would also make looting afterwards much more fun)
Xygoz - 3/10 difficulty - Range on the ae makes it trivial. Even my wiz joins in on the nuking on this one. At least give him the ae range of CT to make it feel like its earned.
Sorry for going off-topic.