Dies to Removal

The list plays Wingmate Roc because it's a two for one almost all the time. The theme of the deck is to present more targets than the opponent can handle, so Wingmate gets the nod.

I like Akroan Hoplite in that list.

Both have their drawbacks. You can't Suspension Field a smaller dude which could be something you need to do in some games. It also gets blown up by enchantment removal which will likely come in postboard from the decks that you really want Suspension Field against. Typically if you are behind against the decks you'd want Suspension Field for, it being a better topdeck than Ride Down is likely irrelevant because you are not likely to win from behind with this deck anyway.

I think Ride Down is a fine substitute if 10 Mountains won't get you there as often as you want.

Or swap the Marauders for a Mountain, two Chandra, and the fourth Searing Blood.

[deck]
4 monastery swiftspear
4 firedrinker satyr
4 seeker of the way
4 borderland marauder
4 goblin rabblemaster

4 chained to the rocks
4 magma jet
4 lightning strike
3 searing blood
4 stoke the flames

4 temple of triumph
4 battlefield forge
1 wind-scarred crag
2 plains
10 mountain

2 erase
2 ride down
1 searing blood
4 satyr firedancer
4 arc lightning
2 harness by force
[/deck]

This is where I would start.