Power Up
Okay, so i am not a fan of these questions but i literally have no strong feelings towards powering up any of these pokemon in any order. I will eventually power up All if not most of these pokemon. So here goes
Pokemon Level Moveset IV(Attack/Def/Stam)
Snorlax 20 L/HB 12/15/15
Gengar 20 H/ShB 15/15/14
Lugia 22 E/FS 15/15/14
Tyranitar 20 B/SE 14/12/15
Houndoom 26 S/FP 15/10/14
Moltres 20 FS/O 14/14/14
Most to all of these will be powered up at some point, and who knows maybe i can power up 2-4 before Mewtwo is even here. But which do you all think would be priority, Hesitant on Houndoom.... have a 3000CP Ttar and another 2600 Ttar. have a Blissey but that is back of the line.
Answers
yeah you may want to check the breakpoints for TTar, depending on the att/def ivs it'll be somewhere between Lev 26-28 so that could lower your cost into serviceability.
Also, if you are only powering up to Lv 30, the houndoom is already halfway there. So for approximately the amount of dust it would take you to get a single level 20 to level 30 (75,000), you could get both Ttars (47,000) above the breakpoints (lv26.5) AND power the doom to 30.5 (41,000).
Edited to include dust/breakpoint levels