If you don't know the numbers, then get the mast in column. If the leeward shrouds go slack in less then 15 true, tighten them 1/2 turn at a time. That'll get you close, and keep the stick up.
If you want more info, look into a tuning guide from a sailmaker or go out and do some testing yourself. Less tension for lighter air, and more for heavy air, keep a log of tuning settings, conditions, and results. It honestly doesn't take more than a few trips out.
Buy a good gage. It makes a big difference on almost all boats. Cruisers probably won't notice any difference.
As far as dynamic, in most racing you can't change the rig tune while racing. That would truly be dynamic. You can change rig tune on most OD boats between races, and it frequently gets done. Especially in the J24s and Bene 367s.
Merit 25 # 764 "Audrey"