I'll chime in as well, because it's always helpful to get help from anyone of any level with experience.
While Taiwan doesn't have the depth of players in the US, I think we still have some players who (I've been told) can easily be semi-pro and possibly pro level in the US. I've had relative success as an offensive goalie, and I think it comes from a combination of several factors and abilities.
1. A fast pull that can be very short, short, medium, and occasionally long (need to make that more consistent) from any point. Of course, there is a more natural far-side set-up point. It's important to have a lot of release points (and even start points).
This alone may work well on up to rookies, I think. But then more zones start coming up, and taking away those lanes. So...
2. An angled brush shot from the same set-up point. Often the angled shot is open if the opposing forward is focused on a straight pull.
But some people know to look for that as well, and cut off that angle.
3. Tic tacking effortlessly between you goalie 2-rod men, off the walls, etc. Moving the ball can cause a forward's D to get lazy and open some holes. While you're tic tacking, look around for opportunities. Honestly, sometimes I just focus on the forward's 3 with the goal to not get blocked or stuffed by that. I sometimes worry less about his/her 5.
When you have a bit of offensive skill, defenses will focus their attention towards the center of the table. To keep them on their toes, ...
4. Get a bit of chemistry with your forward and throw a pass once in a while. I particularly like a sudden pass between the opposing 51 and 52 players (or 54-55).
If all that doesn't seem to work...
5. Bank and angled shots. Just clear the zone any way and try to move the ball up where your forward has a chance to get to it.
So, keeping all these in your back pocket, watch the defense and analyze what will and what won't work.
Hope that's a little helpful.