Use the RTB calculator & apply that figure.Can we only apply one rent increase or the cumulative total from each year since the last ?
You don't have to issue a new lease, nor can you deliberately include more onerous conditions.
Quarterly inspections are more than sufficent & I drop down to six months & then yearly as long as there are no issues.
Unfortunately you've made the classic mistake of not keeping your property owner hat on (inspections, rent reviews) while you have been in limbo.
Edit to add: don't accept a single thing from RTB over the phone, ask them to put it in writing.
If they are not prepared to put it on paper, its worthless.