Aid from Bats vs. Immortal Grapple

Okay, so there is still a window by which a minion with a sniper rifle who blocks can set the range, before the opp vamp plays drawing out the beast?

Only if the acting vampire wants to: Drawing and the Sniper Rifle set range are played in the same Before Range window, and the acting minion always gets the first opportunity to play. However, the acting vampire can also decline to play, and if the reacting minion sets the range with Sniper Rifle, the acting vampire gets another opportunity to play Drawing after.

The acting vampire's choice: play Drawing before to keep the range close, or play it after to cancel the rifle strike.

Ok, so basically its the acting vamp to set the range gotcha.