i'm just trying to learn here, so this is more a question than a suggestion (since i'm in NO position to suggest anything as a newb).
would it make any sense to increase the ratio by selling the 155 puts, for example (or even the 150 puts); since they'll depreciate @ a higher % than the 160 calls will appreciate and, being so far otm and this being a basket which isn't going to move against you 15% in a day, you'd have plenty of time to adjust if the OIH starts to breakdown.
i realize that this doesn't give you the same protection as buying a 170 or 175 call, but, unlike that option, it's not a potential wasting asset. that and this doesn't have the same risk profile as an individual stock- especially to the downside (well, unless iran sacks their lunatic leader and replaces him with a jew- that might do it!).
anyway, am i completely off base here? if so, where does my logic err? keep in mind, my idea is based upon the assumption that he'd prefer not to close the position right now.