[ploxiln]

That's right, the default. (but also, see teraflop's comment about ambiguous implied patent license)

It seems that any variation either hurts my defense or comes off as aggressive (which is what happened to facebook).

In a hypothetical situation where the patent language matters, it's total war. Multiple concurrent lawsuits in opposite directions, ITC injunction requests, etc. Maximum pain to make the opponent capitulate. None of these patents are really valid anyway, it's either math or implementation detail. There's no reason or logic here.

Better to make no statement, leave the default unsaid, and stick your head in the sand, it may keep you under the radar of involvement.