Aor. of haireo^ is eila or eilon.
I’m not sure about its Subj. forms.
elo^metha ?
Teach me please the principle of how to make Subj. and Opt. from the Indic. Aor. form with initial double vowel like eilon.
The (second) aorist indicative active form is εἷλον.
In the case of this verb, εἷ- is lengthened by augment.
The aorist stem without augment is ἑλ-. Aorist subjunctive active is ἕλ-ω, ἕλ-ῃς, etc.; optative is ἕλ-οιμι, ἕλ-οις, etc.
Thank you Qimmik 