This is basically a semantic v. practical question. Thorn gets no practical benefit from attack speed, afaik, because her attack speed is basically locked to her charged time which, afaik, attack speed does absolutely nothing for (in fact, afaik, absolutely nothing affects her charge time).
I’m not really fond of Codex Fragment because the legendary benefit is really bad. From what I know, the skill damage increase upon taking damage fades super fast and you really shouldn’t be taking a constant stream of damage as Thorn (she’s really mobile); I’d rather use a purple +skill/+hp than the Codex Fragment.
Still, I’m super fond of the Bola’s Targeting Finder, especially for Thorn. Her curse damage is considered skill damage so it should trigger the +dam from Bola’s, making basic + Volley an utterly devastating combo (I can use that to kill a Brute in about half of a second in 5 man content).
Rather than Codex Fragment (which really seems like you’re just taking it for the +hp component), I’d still probably go for the Vampiric Vestment, which is going to provide an almost obscene amount of +hp (especially on a single item, so you could buy it first and get super tanky asap) as well as a useful amount of +attack damage.
[quote]I’d rather have a cheaper loadout on advanced Helio to get my gear up early, before hitting the left side at least as that’s where it gets intense.
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I’ve never really had a problem with Helio adv at the start. The biggest problem most people make is playing too aggressively, thinking that they really need to push to beat the timer, but I haven’t really experienced much of a rush. Even taking your time, you should be able to finish with ~2 minutes left (10 minutes per side).
The hard part of helio adv is the boss rush and thrall spawns, especially when solo hardcore, because you have to survive those massive spikes in damage when a horde spawns on top of you and you need to kill stuff quickly and efficiently.
The other advantage of being solo is that you’re not sharing shards with anyone so a triple legendary loadout is even more feasible than normal.