Modern Decktech: Affinity

Wrapter played an interesting variation on Affinity to 3-1 in a DE yesterday.

Here's the list:
//19
1 Plains
4 Seachrome Coast
2 Hallowed Fountain
4 Blinkmoth Nexus
4 Darksteel Citadel
4 Mox Opal

//20
4 Memnite
4 Ornithopter
4 Vault Skirge
4 Signal Pest
4 Frogmite

//21
4 Tempered Steel
4 Cranial Plating
4 Springleaf Drum
4 Thoughtcast
1 Steelshaper's Gift
4 Remand

Sideboard
4 Dispatch
4 Etched Champion
2 Ethersworn Canonist
2 Negate
2 Rule of Law
1 Steelshaper's Gift

Some interesting choices here:

Steelshaper's Gift is the 5th Plating, and boarding a 2nd in matchups where he needs to make every guy a must-kill or race (so vs Zoo and Combo, I would assume?)

Not sure how I feel about boarding champion instead of maindecking say 2. /shrug

Splitting Canonist and Rule seems fine to play around Echoing Truth.

Remand seems unexpected, although I'm not sure how good it actually is.