You should have a very very good aggro matchup because of all the cheap removal and threats. Also lifelink on seeker is such a beating. I'm currently +10-0 vs various aggro decks (monoR and monoB). Your list is way off i'm afraid to say and it also looks like some budget concerns. There is no other way putting it other than YOU NEED 4 of rabble, battlefield forge and temple of triumph.

Banishing Light is way too slow to play since your deck aims to out tempo people by casting 2 spells by turn 4. By the same logic cut the magma jets as they are too slow as well and suspension field is just hot garbage when there's a card like valorous stance avaible. Up the numbers of chained to the rocks to 4 and have a a mix of wild slashes and valorous stances over the before mentioned removal.

Play 4 hordeling outburst. It is insane vs aggro decks and also helps your gameplan of casting 2 spells per turn since it's a "free" spell to cast if you convoke it into stoke. A possible line of play is T2 seeker -> T3 hordeling outburst + stoke on a courser. You've advanced your board and removed his in the same turn, good tempo.

Talking about threats here i dont think swiftspear is where you want to be. At least not as the only 1 drop, i'm believe if you want to play 1 drops you need about 10 of em to be sure to have one in your opener and if that is your goal you can just go monoR (which i've switched to for the funs and went 4-0 yesterday pretty easy). Also monastery mentor isn't that great in this deck especially without wild slashes and the full set of chained as a secure way to make a token at turn 4. Also valorous stance can double duty to save him, but even then he is not a priority threat in my opinion. Cut him and the swiftspears for a threatbase looking like this:

4x Seeker of the way

4x Rabblemaster

4x Hordeling Outpurst

2x Ashcloud Phoenix (strong on offense and a great blocker as it trades with many creatures but doesn't die itself).