I've been running it solo. Believe it or not I've only matched against complete fire teams like twice out of 20 or so matches. The solo guys are good players and can hold their own. The trick is, if you see some one good at running the spark. Clear them a path and let them run the goddam spark. I'll sacrifice myself so the better runner can ignite and help us win. Problems arise when either no one wants to run the spark or if everyone does.