Commentary on line 6
skopo/n, with ei)/somai ai)/ ke tu/xwmi as an accusativus de quo, as to another mark I will know if I shall hit it: cp. 14. 366, also Il.8. 535αὔριον ἣν ἀρετὴν διαείσεται εἴ κ' ἐμὸν ἔγχος μείνῃ.
Some take ei)/somai in the sense of a fut. of εἶμι, viz. I will go at; cp. εἴσεται in 15. 213, ἐπιείσομαι ( Il.11. 367. Il., 20. 454), and εἴσατο or ἐείσατο in 8. 295. Il., 22. 89 and often in the Iliad. But this εἴσομαι would surely take a gen. of the object aimed at: cp. l. 89.
