Yeah, you want to know both: the article, and the case endings. There are case/genders where the article is ambiguous but the case ending isnt, and vice versa. So theres not really one silver bullet that works in all cases (no pun!). By looking at all the clues you can know with more certainty the case/gender/number. Same thing when it comes to verbs. Reduplication is a dead give away for the perfect tense, but vocalic reduplication looks identical to the augment for past tense (imperfect/aorist), so then you look for the kappa tense formative. As you read more and more this process becomes more and more automatic.
Speech is my hammer, bang the world into shape, now let it fall! -Mos Def