sending 6 at once or 2x3 which is better method to get a player?  thanks

I don't believe it makes a difference on total impact if you send them all at once or in smaller batches.  The times when sending them in smaller batches makes sense is if you're worried the player may reject them, if you send 30 in 3 batches of 10 he's more likely to reject them all than if you send them in 10 batches of 3, hope this helps.