I guess Covetous is better than Slogger if you are playing equips, as it has evasion... On the other hand Slogger implies almost in any case 4 shocks

I'm going with 2 covetous right now, looking like this:

2 Blood Moon
4 Magus of the Moon
4 Chalice of the Void
3 Trinisphere

2 Covetous dragon
3 Moltensteel Dragon
4 Lord of Shatterskull Pass
2 FTK

4 Seething Song
4 Simian Spirit Guide
4 Chrome Mox

2 jitte
3 SoBaM

4 Ancient Tomb
4 City of Traitors
4 Great furnace
7 Mountain