Looking at the predictions for this month (February) for propagation between DL & VK6, it looks like 40 metres should be the best for short path contacts between 14:00 and 22:00 UTC. 20m could be possible (but at 4 S point lower lower signal strengths) between 11:00 and 17:00.
Of course March will be different, however in general it looks as if 40m rather than 20m may be better for any SP contacts.
Also looking at the Eastern states, the same table of predictions does not have the MUF even getting up to 14MHz for LP contacts from DL. Again, we know February is presently not performing well. We'll need to see what March brings.
If anyone in EU has had any contacts into VK/ZL in an afternoon on 40 or 20 metres from a portable installation so far this month, it would be interesting to hear.
We really are (of course) dependant upon what the propagation does over the next 3 weeks though.