100NL

Wanna-be-tricky opens for $4 from the CO. He will do this with the top 20% of his hands. Overall, he plays too many hands and takes them too far post-flop.

You call in the BB with A 5

Flop is A 9 4

What's our plan for the rest of the hand?
If our opponent is kinda TAggy, but has an open range of 20% here, how does this change our plans?
How do we balance our line with the times we want to rep an Ace into an opponent that didn't like this board?