increase the amount of time it takes for a headspider to take over

[Roomba]

If it is taking ten seconds and not thirty though, then that's a bug and should probably be fixed. If there isn't a period of time where the headspider could reasonably be surgically removed if someone nearby were quick on the draw, then there's no incentive to do that instead of just suiciding/crushing or walling up the headspidered guy. Which in turn gives people a significant disincentive to fight the ling, or just makes them go 'fuck it, killing a ling is suicidal anyway, bomb time', neither of which are very fun.