The sahir aren't necessarily the most warlike of traditions so I don't have any fully stated characters of that description, but I did write up a few naranj of a martial nature a few years ago for my Non-Hermetic Grimoire thread - it was unpinned recently, but you should be able to find via the 'Search' function.
Anyway, the thing about the Sahir is that, except when summoning spirits, they're going to have crap Penetration so if they know they're up against Magi, they need to circumvent that in some way. They can boost it somewhat via Khuddam Bonds or Solomonic Astrology, but it's still not optimal and typically requires stronger spirits which correspondingly reduces their Summoning Strength.
The first methods, as Xavi mentioned, is simply summoning Jinn and having them attack the magi in a mundane fashion. This not only ignores MR, but unless the magi know the Form or Realm the spirit is aligned with they could have a hard time fighting back. If the Jinn is powerful enough, it might be able to breach Parma Magica with its own innate powers as well.
The next method is using methods that don't interact with MR.
- Solomonic Alchemy is good for creating Aimed effects such as making rain as hot as boiling oil or turning a gentle breeze into a bitter sirocco (the effect is magical, but momentary and thus can affect characters protected by Magic Resistance.
- Solomonic Astrology is nice for intelligence gathering and, if used in conjunction with mundane astronomy, ignores MR.
- Solomonic Physic can be used to enhance an ally's Characteristics prior to battle or afflict grogs with Personality Traits like Disloyal or Cowardly.
- Solomonic Storytelling can cause those without MR to harm the magus or themselves. Their illusions are mental and thus need to Penetrate, but can be feeding magi false intelligence via grogs.
- Solomonic Travel can let you move troops long distances almost instantly although it does require a bit of lead time.