As the title says, I'm not sure what's considered "enough" stats on an item that would qualify it as suitable for what I need.
The main item I have this problem with is Atma's Impaler. Most champs would get about 40ish damage out of the passive, so in total it'd get you 45 armor, 40 damage, and 15%crit chance. Crit chance I understand, but is 40 damage and 45 armor good enough to warrant buying it versus spending the gold on something like Frozen Mallet instead?
A similar case is Sunfire Cape and Wits End. Is the 40 magic damage make enough difference to warrant the purchase?