The boat will balance VERY well and shouldn't require any "heavy lifting" with the tiller. Most times, the boat will balance using the centerboard leaving you with a neutral helm. She will have a tendency to develope strong weather helm if over canvased. The reefing schedule taken from the Tartan 34 Classics Association website:
First reef in the main at 17 knots.
Bring in 1/4 jib at 25 knots.
Second reef in the main at 35 knots.
Hope this helps.
hunter Legend 37 Semper Paratus
Formerly - Tartan 34C Yawl