Boros Aggro

[opag78]

https://deckstats.net/decks/9989/48252-boros-aggro

[deck="Boros-Aggro"]
12 Mountain
4 Sacred Foundry
4 Temple of Triumph
4 Rakdos Cackler
3 Firedrinker Satyr
4 Burning-Tree Emissary
4 Ash Zealot
3 Boros Reckoner
3 Chandra's Phoenix
2 Fanatic of Mogis
2 Pyrewild Shaman
4 Boros Charm
3 Chained to the Rocks
4 Lightning Strike
3 Magma Jet
2 Mizzium Mortars

//Sideboard
SB: 3 Pithing Needle
SB: 1 Chained to the Rocks
SB: 2 Mizzium Mortars
SB: 4 Glare of Heresy
SB: 4 Pacifism
SB: 1 Ratchet Bomb
[/deck]

This version is tuned to perform well against other create-based decks (e.g. Mirror, Rakdos, Mono-White, but also Mono-Red & GW) and it works very well against Mono-B.
Mono-U can be won due to Chained to the Rocks. Against Rogue Decks like Simic-Prophet or Golgari it is also performing well.

Gruul and Esper are much more challenging matchups.

Hence, I am specifically uncertain about the sideboard.

I would like to integrate 4 skullcrack against Control-Decks (Esper, UW), however I dont want to cut the Pacifisms (e.g. -3 Pacifism & -1 Ratchet Bomb for +4 Skullcrack) as I think need them against Gruul.

I also still search for a good solution for these Caryatids other than Mortars for 6.
Any opinions ?