The easiest way to deal with this is Chandelure.
Although his typing is weak to both a bulky spread will take down both and can set up TR.
The only thing is that it can't take up vs Aegislash Shield if it uses Heat Wave so I choose Overheat with some SAtk investment since it doesn't take out Aegislash out with Fire Blast and full investment:
148+ SpA Chandelure Overheat vs. 252 HP / 76 SpD Aegislash-Shield: 168-198 (100.5 - 118.5%) -- guaranteed OHKO
The Final spread and idea for TR:
Chandelure @ Focus Sash/ Colbur Berry/Sitrus Berry/Leftovers/White Herb
EVs: 104 HP / 156 Def / 148 SAtk / 100 SDef
- Shadow Ball
- Overheat
- Trick Room
- Protect
It OHKOes both Mawile and 252 HP/76 SDef Aegislash-Shield with Overheat at 0.
It lives:
252 Atk Parental Bond Mega Kangaskhan Sucker Punch vs. 104 HP / 156 Def Chandelure: 123-147 (83.1 - 99.3%) -- guaranteed 2HKO
52 Atk Huge Power Mega Mawile Sucker Punch vs. 104 HP / 156 Def Chandelure: 124-146 (83.7 - 98.6%) -- guaranteed 2HKO
252 Atk Garchomp Earthquake vs. 104 HP / 156 Def Chandelure: 116-140 (78.3 - 94.5%) -- guaranteed 2HKO
252 SpA Salamence Hydro Pump vs. 104 HP / 100 SpD Chandelure: 110-130 (74.3 - 87.8%) -- guaranteed 2HKO
252+ SpA Kingdra Muddy Water vs. 104 HP / 100 SpD Chandelure: 102-120 (68.9 - 81%) -- guaranteed 2HKO (Outside of Rain)
You have to watch out for Hydreigon and 252 Adamant Mawiles though:
252 SpA Hydreigon Dark Pulse vs. 104 HP / 100 SpD Chandelure: 132-156 (89.1 - 105.4%) -- 25% chance to OHKO
252+ Atk Huge Power Mega Mawile Sucker Punch vs. 104 HP / 156 Def Chandelure: 160-190 (108.1 - 128.3%) -- guaranteed OHKO
Although Intimidate solves this for Mawile:
-1 252+ Atk Huge Power Mega Mawile Sucker Punch vs. 104 HP / 156 Def Chandelure: 106-126 (71.6 - 85.1%) -- guaranteed 2HKO
