I actually feel like I'm going even further towards the Black Mage role post-1.18.
In one full day of post-1.18 playing, I used Curaga only once.

Post-1.18 people seem to be taking more responsibility for self-healing because:
- Conjurers are much more judicious about healing due to the new MP costs
- most established players have learned some self healing abilities and can be self-sufficient
- healing others pulls an incredible amount of hate now
- self healing also spreads the MP burden around the party

So far I've been:
- doing more attacking, cycling through the basic attacks since their timers are pretty long
- using Radiance and Siphon MP whenever possible
- using Stoneskin II mid-fight every once in a while since the MP cost is much lower than heals (and seems to pull less hate)