BrightEye, i use the Quint card to test my interpretation. For instance, i did a new years reading @ the start of the year for a friend of mine, and noted that the cards were suggesting that "isolation" would be a factor for her at some pt. during the year ahead. Then i recently did a 5 card cross to gain a lil more insight as to what was in store for her, & lo & behold the cards once again identified that she would undergo a period of isolation. Not surprising, since i took this 2nd./last reading just before she uprooted her family & moved a considerable distance away. (Altho i might add, i wasn't aware of her decision to move until a wk. later, when she phoned to tell me of her plans to relocate).
However, at the time of her last reading, i used the Quint. card to test my interpretation, and as the cards she'd chosen totalled 54 i reduced this to 9, and as The Hermit can suggest isolation, i felt confident that my interpretation of her reading was well founded.
As far as your query re: whether the Quint. card could offer advice, this seems plausible to me, because to my way of thinking IF the quint. card can be applied to the reading in the sense of supporting the reading, then any additional info./insight you can glean from this card can be read & used ... much the same as clarifying cards are used.
As i say, the way i approach the Quint. card is to use it to TEST the Interpretation ... & in some instances to give the reading a "title". So what i'm looking at whenever i use a quint. card, is whether it literally SUPPORTS my interpretation. & 9 x's outta 10 it does, i might add.
In the odd instance, when it doesn't support my interprt., i will THEN USE a "shadow" card to look to see if there is some hidden factor that hasn't shown up in the spread/reading & for which the quint. card might shed some light on. Or in otherwords, IF the quint. card doesn't clearly support the reading, then i'll check the the shadow card to see if the quint. card could be read in relation to it.
Then depending on what i can glean from this combination > quint & shadow card, i might discover a secondary or underlying issue, which oftens serves as a basis for another reading.
So for me, the quint. card is a way of measuring whether i've gotten all the info. i need from the reading. << Or in otherwords, whether i've hit the nail on the head type of thing.
Generally it helps me to put the reading in context, and sometimes it serves as a basis for further exploration. I find this especially helpful, as i tend to do a 'series of readings' whenever i read for someone. I start with a 7 card spread & if the quint. card is truly supportive, then i feel like i'm on the right track. > So for me, this card can be used to determine what area to focus on.
PS: I'm new to aeclectic, so as this is my 1st post, here's hoping i haven't somehow goofed!