A few questions that I had a hard time inferring:
1a Can a Magus casting 'chill touch' use the feature spellstrike to deliver multiple touches in one round?
1b Do you need to use spell combat (or can you, even) to deliver the extra touches past the first?
2 Can the trait magical lineage turn a level 1 spell into a level 0 spell (and thus make it a cantrip) if you apply a +0 level metamagic feat or feature to it?
3 Using Monstrous Physique III and IV, can you assume huge size of a monstrous humanoid race that isn't normally huge to get the size bonus? I checked and there are no monstrous humanoids that are regularly huge in the Paizo beastiary.