I have an all BELF 4x Warlock 1x Priest team atm and it rocks (Ok so I only just hit 20 with them but had a big life event recently so play time is down) Been running them for 2 months

It is hugely amusing farming 3+ levels above your team and just hitting each mob with 9 dots... Ghostlands held no fear for me ;) clearing orc villages in a single pass (run through and dot everything) 4x VW keep the agro off the clothies