My First Uncleaned Coins, One Week Later. Thoughts?

I've been intrigued by ancient coins for years, way before I actually got back into collecting coin, in fact. I've been avoiding big coin purchases until I learn more, and this applies 10x to ancients, as there is just so much to learn before I will feel competent. So far I have read Sayles' first book, but that's it. I'm going to get his whole series, and I've done a bunch of research as to other books to read next. Last week at a local coin show, I bought my first ancients. My plan was to wait longer, but this dealer had a group of uncleaned coins at $1 each, so I figured why not. I search through the group and bought six, which he let me have for $5. Here they are:





The dealer freely admitted that this lot wasn't so good, which is why they were priced so low. I expected most of them to end up being trash, but I was hoping for at least one partially attributable coin, as a memento of my first ancients purchase. I've tried to read up on cleaning techniques, but for me this area has been more difficult than learning about the coins themselves - there is a lot of conflicting information out there. I decided to stick to the basics for my first attempt: distilled water, changed daily, with a toothbrush scrub when I changed the water. Here are the results after one week:





A couple notes on the pictures. First, I switch coins A and F in the second set. Second, everything appers lighter in the pictures than in real life.

I think three of the coins are definitely done. B and C seem to be complete culls. The patina is clearly flaking off B and there is no detail underneath, but there was no detail on the patina either. C and E seem like the patina was already off the coin, and maybe they were re-dirtied? This is just a guess. C is also completely void of identifiable details, but perhaps someone could tell me Something about E. The reverse seems to be two winged figures with a group of circled letters between them.

The other three seem like they may benefit from more cleaning, though being entirely inexperienced I don't know what to do next.

This is coin A:





Looks to me like there could be enough detail to ID this coins, but I am worried that the patina appears to be flaking off at the edges, and I'm concerned any further work will reduce it to a brown slug.

Coin F:





Also may have more detail underneath, but I suspect that much of the edge, and hence the legend has chipped off, which will make it very hard to ID.

Lastly, coin D:





May have the most detail remaining, but it is hidden under pretty heavy encrustations. I don't quite know how to proceed. Water doesn't seem enough for this coin, but I am not familiar enough with other techniques.