I've never used a the 4-1-4-1 you mention, but plenty of people use 4-3-2w-1. I've also used 4-3w-2-1 which also isn't too extremely different. Be wary of 4-3-3 and 4-4-2.
If you'd really like to go all out attack you could play 3n-1-3w-3:
----------AML---
DC------------ST
DC-----MC-AMC-ST
DC------------ST
----------AMR---
I wouldn't normally suggest a formation like that, but it seem you are trying to go all-out attack.