Note: If you're in the MN area and I've spoken to you about "killing you with a dragon," please don't read any further.
I'm in the process of designing a level 7 / MT 3 playtest session and I want to make sure I cover the right bases in my encounter selection. The playtest doc says to add the CL and MT, so APL = 10 by that rationale. I've upped the starting gold from the normal level 7 amount to 45k (closer to level 9)
Second encounter: 5 Shadow Mastiff (CR 10)
Third encounter: 3 Terracota Warriors, Indestructible template added (CR 10)
Final encounter: 1 Adult Underworld Dragon (CR 11)
The final encounter has some feat swap-outs that might shift it upward in CR (removed 3 melee feats and replaced with Toughness, Flyby Attack, and Quicken SLA for Stone Shape).
I'm concerned about the impact of lowered BAB, CL, and such in these encounters, but I wanted to focus on CR appropriate fights based on the APL adjustment for MT 3. Are there any recommended adjustments or additional encounters?