This sounds a bit dodgy. I don't endorse paying someone with less than 5 years 250k/year but if you're looking at someone then the amount of options you give them should be worth at least the salary cut over the vesting period. So say you're looking at some VP potential that could get 400k per year working at Netflix or something and you're going to pay them $150k. Then you should offer them (imo) $750k in options vesting over 3 years. That's in now money, as in that should be whatever the investors in your last round paid for that same stock.
Not an exact art of course but if you do it that way, and you explain your logic in the offer, and they still don't agree, then they just don't want to work for you. If this calculation comes out to something that's untenable for you, then you're looking at too expensive engineers and imo you should move your company out of the valley.