I haven't kept tinctorius in years, but I seem to remember them easily climbing a couple of feet high, and would have gone higher if they had the chance.
They weren't particularly good at it but managed well enough.
How high is 'terrestrial'? 3, 4, 5, 6 feet? What does that entail in terms of inclines, perches, obstacles etc.?
I think giving them as much space as is practical is always a good idea. Just maybe have a few levels of plants to break their fall.