Most competative builds

I was wondering what you all think is the best build in 40k and why. at 2500 points

I'm going to have to go with my ard boys list.

4 10 woman troop squads 2 meltas and a combi melta on the vet in each one
Rhino with smoke and search lights

2 dominion squads with 4 meltas vet
Immolator with muti melta on the top and smoke

1 dominion squad with 4 flamers vet and banner
Immolator with heavy flamer and smoke

Cannons blessed weapon cloak of st. litness of faith and book
8 Celestin with hv flamer and flamer vet eveserater Priest 4+ involm and eviserater
Rhino smoke search lights

Inquisitor lord phi cannon terminator armor hood 2 mystics 2 acolytes

2 exorcist tanks

1 heavy weapon teams 10 sisters 1 vet and 4 heavy bolters

In short it is

16 melta guns
2 multi meltas
4 combi meltas
2d6 melta missiles
5 flamers
2 heavy flamers
4 heavy bolters
2 eviseraters
1 blessed weapon
46 bolters

11 faith points and 1 free one

This list has allot of tank killing power and troop killing power.

The down side is i only have 1 close combat unit.