I hand wrote all exam prep essays (and most essays through the year). Just a context-dependent cue thing I suppose? I always wanted to be realistic to exam conditions. I wore my school uniform everyday of SWOTVAC just because that's what if do in the exam.
If your hand is strained, sounds like a good reason to write so it gets used to it.
I did probably about 2-3 practices for Context, and they were all very forced; I did them mostly so I could say I did a full English exam.
I did significantly more for ULP but still less than for text response.
I think drillin ULP gets pointless be ause it's an application of a skill, an I personally found context practice pretty pointless as I refused to write an unoriginal story in the exam, but text response practice will never be pointless, because there is always more things to know and refinements of interpretations to be made and different prompts to respond to etc.