The Main Offenders
I cannot stress enough how much stronger shadestepper is when theres minions. Silent Killer, Violent Vortex, and Harvester form an absolutely insane combo.
Let’s say you land a vanish boosted backstab on a boss here’s what happens next
1. Violent vortex triggers, most likely killing many of the nearby enemies
2. By killing these enemies you refill most of your mana or at the very least get back the mana you spent to land the vanish backstab
And finally the really big one
3. Your vanish cooldown resets because violent vortex killed something
SIlent killer is the biggest offender when it comes to feast or famine because since your vanish cooldown reset this also means surprise strike, shadow travel, and dissolution also have their cooldown reset.
Meaning you can now go land another vanish boosted backstab which triggers violent vortex, which refills your mana and then lets you do it all over again.
Harvester is frustrating and out of all of shade’s abilities I want this one to get reworked the most. Unlike other mana nodes (that are actually good), you can’t build with harvester in mind because many bosses just don’t have minions to reliably farm mana off of. So you are left with two option, either build sustain assuming harvester doesn’t exist (and then have extra mana you don't need in fights harvester does something) or you just don’t have enough mana 50% of the time. And shadestepper not having a proper mana node is a really big problem in my opinion for reasons ill explain later.
Violent vortex is the least offender between vortex, harvester and silent killer since the node mainly exists to compensate for shades meh aoe/crowd control so if there's no enemies around its not a big deal if you lose out on this.
But like I said before its the combination of these three abilities that is a problem because none of these nodes do anything if theres no minions.
Now for the other two