Herbert Weir Smyth, A Greek Grammar for Colleges

Present (continuance): πλούσιον δὲ νομίζοιμι τὸν σοφόν may I (always) count the wise man wealthy P. Phae. 279b; Aorist (simple occurrence): ““εἰ γὰρ γένοιτο” would that it might happen” X. C. 6.1.38; Perfect (completion with permanent result): τεθναίης die (lit. may you be dead) Ζ 164.

a. In general conditions (2336) 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 if any one violates this, let him be accurst of Apollo Aes. 3.110, ἐπειδὴ δὲ ἀνοιχθείη (τὸ δεσμωτήριον), εἰσῇμεν παρὰ τὸν Σωκράτη whenever the prison was opened, we (always) went in to Socrates P. Ph. 59d. The aorist is often preferred to the more exact perfect because the perfect was rarely used.

c. An independent or dependent optative may be ingressive (1924): εἰ πολεμήσαιμεν δι᾽ Ὠρωπόν, οὐδὲν ἂν ἡμᾶς παθεῖν ἡγοῦμαι if we should enter upon a war on account of Oropus, I think we should suffer nothing D. 5.16.