I used the CB tins a few times, I always added a kilo of LDME and used s-05.. but I also always added hops- usually to make APA's.
If you wanted to give that a go:
Boil the LDME in about 10L of water and add my hops and boil for 10 mins for an APA or half an hour for an IPA. Usually used Cascade and Amarillo and sometimes a bit of Simcoe in the mix. Also for not much more effort you can steep 200g of crystal in ~70c water for half an hour, remove the grain bag and boil the sweet water and use that water to add the LDME to.. really makes a pretty nice drop.
You can add the tin at flameout and stir it in so it'a all mixed up well, cover the pot with foil and chill in the kitchen sink for twenty minutes/ half hour (changing the water maybe three or four times).
Add this mix to fermentor and top up with water to desired level, usually ~23L for my APAs and 18L for IPAs, usually it's at pitching temp by this stage so you can add yeast (rehydrate or just sprinkle straight in- I rehydrated). Ferment at 18c.
I usually dry hopped as well but up to you, makes a tasty brew either way.
Or if you din't want to go that far by adding grains and boiling hops, I would still recommend using just the two tins and us-05 but dry hop for 3 days at end of ferment (even just 20g of cascade) it will add a little extra to your beer.