Discreet and unassuming, Singularity is a thinker first and foremost, and is unlikely to make big waves. He'd rather sit back and analyse the situation, and will rarely take action or comment on a situation until he feels his input is both a) accurate and b) necessary.
As a result, he's somewhat lacking in combat experience. Furthermore, he has demonstrated no particular fighting ability of his own. He has, however, been "around" for a while, and has accumulated quite a collection of curios. These "welcome gifts", while of varying usefulness, do include a number of impressive items that make Singularity a deceptively resourseful opponent: