Optative (not in indirect discourse).—The reference is always to future time. The tenses do not refer to differences of time, and denote only the stage of the action.
Present (continuance): πλούσιον δὲ νομίζοιμι τὸν σοφόν
εἰ γὰρ γένοιτο
a. In general conditions ( cross2336) the optative is used of past time.
b. In dependent constructions (including general conditions) the action of the present is generally coincident (rarely anterior), that of the aorist generally anterior (rarely coincident), to the action of the leading verb: εἴ τις τάδε παραβαίνοι, ἐναγὴς ἔστω τοὖ Απόλλωνος
c. An independent or dependent optative may be ingressive ( cross1924): εἰ πολεμήσαιμεν δι' Ὠρωπόν, οὐδὲν ἂν ἡμᾶς παθεῖν ἡγοῦμαι
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].