Pace, if you pull up into the vertical, whether I am in a glider or flying the tug, I would be happy....of course the glider or the tug pulling a glider has the right of way....and your plan form in ascent would of course get my attention.
But my only option in either case and what I actually did was to dive dive dive!
Like the time I was pulling up the Navy glider at Weston, and was nose to nose with a twin out of Kidlington. I saw him in good time, and turned right. He turned left. Thanks a lot, jerk! so then all I had left was dive. The Navy pilot held on to the tow, good idea because the twin only had one target to avoid instead of two. When I saw him later he said he had paid for a 2,000' tow and wanted his moneys worth.