If the game doesn't do something stupid, like letting you reassign individual points freely, rerolling can only help you so much with any realistic time investment. Sure, you can quite easily reroll character with max or close to max primary stat for the class you're planning, but they will have quirks that don't have much impact on overall archetype, but would have been ironed out as waste of extra points or deficiencies in secondary stats in point-buy.
That's wrong though, just look at the OP. 18/16/16/14/12/10, that's a 50 point buy, and you can get stuff like that in under 30 rolls most of the time, about a minute of rolling. A regular stat block looks like 16/14/13/12/8/8. Tell me how the first is somehow more 'quirky' than point buy? Sure, you can get some odd numbers, but they are functionally irrelevant other than looking different on the stat block.
Here's the first 10 rolls I got:
18/14/13/13/11/10
17/17/15/13/12/9
17/17/13/13/12/10
16/15/15/13/10/4
15/15/13/12/10/10
15/15/13/12/11/8
15/14/13/11/10/9
15/14/14/11/9/8
14/14/13/12/12/12
13/13/12/12/10/10
The only roll I would consider quirky is the /4 roll, but the change is irrelevant if its a warrior's CHA or something since its a total dump stat in ToEE (PnP doesn't have this problem, a warrior can take part in social settings and make use of a charisma stat). 7 of these are at or above what a point buy would get you, and I'd consider the first 4 to be quite overpowered if the game is balanced for a 25 point buy.
On my 13th roll I got:
18/17/16/16/16/8
Haha holy shit that's OP. That's like a 60 point buy or something.