The dil drop rate is low, but the max sell price of items has changed as of the 9-4-11 update.
•All items sell for 30% of their purchasing value and doesn't cap out at 20,000 anymore.
This means that what used to sell for 20,000 (max) may be higher and worth keeping in your inventory to sell. Deadlands necklaces (I think) sell for around 100-130k each now if I remember seeing correctly. L3 helmets in the tomb used to sell for 40-50k each but I haven't checked their recent prices.
As long as you pick up stuff to fill your inventory to sell back to the shop, you should actually be making money and have enough for skills and wings. Regardless, it will take a little patience.
Edit: Also, which map are you having trouble with? You could post your GMT time zone and ask if anyone will be on at a decent hour to grind with you. Another person could help limit your pot spamming and consumption. You need to also take note that the Blest Weilds in West Morte do not turn white until 178, so it shouldn't come as a surprise to find you may need to have an ample amount of heal to survive there as they are level 180+ monsters (especially if you solo).
While I know it is hard to survive and everyone always needs defense, It would help if you can hold out until the 180s, the shadow tower set is better at +0 than the 160 + 7, so try to throw a few stats into heal and come to a balace. It is hard to argue which is best, however, not knowing your class or if you even have help.