You've got a yardstick on what sort of power should correlate to what kind of Connection rating on pg 387 in 5e and pg 51 in 6we. Either way I'd say a Number Two for a megacorp's sprawl operation could potentially rate in the 6-to-9 range.
Of course you also need to take the context of your campaign into consideration as well. If you're playing Organized Play, contacts with rating 6 are few and far between, and higher than that all but unheard of. If the rest of the contacts in your campaign are 3s to 4s, a 5 would feel like a major asset. Remember the importance of Connection (it's basically the stat you almost always use) so it's imo better to err on the low side than the high side.