In reply to Tigger:
Funnily enough this was my ambition whilst I was at University and my round-about journey involved much the same as yours: Pull My Daisy (which is amazing) and Comes the Dervish (which is also amazing).
In the short term there is some bad news: Scarlett Running Direct (at least from what I recall) is a path compared to Poetry. In the long run there's some good news though, as it sounds like conditions weren't ideal when you were on it and (hopefully) you've got yourself some new shoes now.
When it comes to other suggestions,
Heading the Shot (E5 6b) (which has been mentioned elsewhere) is a good bet as it's hard, but well protected (basically a 7a+ sport route) - as such give you a flavour for the difficult you're likely to experience on Poetry Pink (although HTS is probably little harder than PP).
Is it a Crime? (E3 5c) and
Never as Good as the First Time (E3 5c) on the Conscience Slab are good sport, but pretty straightforward (assuming they're still standing that is, as I know there's been rockfall in that area).
The Sweetest Taboo (E4 6a) is better still, but obscenely bold at the start, although this could be considered good 'training' for Poetry unless it completely puts you off the idea of doing it (I certainly didn't find it soft for the grade though!).
Sure there's a few others I could suggest, but am equally sure a great many others will have some good suggestions too.
Good luck!