Tile roof repairs

Did you ever have one of those days where you want to search down the roofer who did the past repairs and beat them with the roofer's hand book??? well today was that day for me...

We are repairing a 50+ year old Ludowici flat tile roof, with molded ridge caps... Well one of the past roofers thought it would be a great idea to roof cement every tile ( 3 courses down from the ridge )and the ridge cap. Now I have to remove the ridge caps to repair several tiles below...

Trying to chisel them free does not work; a thin scraper could not free them without cracking; I tried a sawzall to cut the roof cement, but with not great success...

So my question to the group... any other ideas ???

Possible next trys...... a heat gun to loosen up the cement, rotozip saw, more sawzall work.