The problem with your question is that from one point of view almost any number of tools that you know how to use will make a task like this "more efficient". Space and time spent simply maintaining the tools aside.
If you were really and truly just going to make a couple of bows a year, then you would be better off buying laminations pre-cut. But if you want to be in control of everything other than the glass backing, then you need some additional tools.
Another very important consideration when making glass bows is how you will handle the very nasty by-products. You can fire up one machine and make your workshop uninhabitable from that point on, with small glass fiber on every surface just waiting to be inhaled and cause respiratory trauma. Even if you use tools like saws and grinders outside, you are hard put to make them safe for use again inside the shop. My solution to this problem for my occasional projects is a combination of tools that can be run out of doors, with hand tool like planes and drawknives to do the contouring work. I have a shop vac with a hepa filter I can use to clean up, or blow off tools.
For starters you need some jigs and the most obvious is the form, normally plywood, though steel can be a good option if you are certain you will be building pretty much one shape. The critical issue is that the form contours be perpendicular to the edge of the form. I use a bandsaw and drum sander on the drill press. Another option is to cut out a patten in thin stock, then use a router and bearing to square the edges. However, you may be surprised by how many routers are very poorly aligned to the base, though there is usually some point on the base where the bit is square.
The next big thing is heat. I built an oven, but it takes up a lot of space, for infrequent use, and is dependent on no longer available light bulbs. I would only consider heat strips that you can get various places including ebay. However, these are quite expensive.
There are any number of ways to make laminations. I have mostly used hand planes, or the drum sander. The nose of a belt sander is also a good option. There are many devices pictured online. Normally you need to make an adjustable jig, or have a spare lamination on hand for a pattern.
What you need varies a little if you are making longbows, or 3 piece, or recurves, so you need to sort that out for yourself.
Beyond that, you can consider each step involved in the process and ask yourself what you would use to do it. A thing I do is imagine I am setting up a small factory, and I try to break down into workstations, the bow building process (learned this approach from a guitar maker). Then for each of those workstations there is a task and specific tool. Of course one isn't going to do that, but it helps me visualize the steps involved. In a home shop we all have different skills and different tools relating to other hobbies, so there is little point in copying what someone else has done, though you can google steps and get lots of ideas.
