You can go after the cheaper seasons if that's an option. Altrock at this point is clearly the 5th man in and he isn't going to get a lot of use. I don't know what your rules are, but if you can use a cheaper season of his (like sub $1 million 1909) then you could free up more money for your lineup, if there's anybody to spend it on. Since you can probably restrict him to pitching in blowouts anyway, it shouldn't cost you much.
Of course, if there just aren't more expensive bats to buy, then go ahead and splurge on the best arm. But the added value is going to be low, so if you can spend that money elsewhere you'll be better off.