I'd be inclined to make a good sized starter. What is the gravity of the wort kit? That'll be your guide.
Punch your numbers into the mr malty pitch rate calculator, and it will give you an idea of what sizes you'll need. If they're a while past their used by dates then you may need to step up your starter.
Remember, you can only pitch your yeast once, better to do it right first time at an appropriate rate for what you're brewing.
JD
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