No, no, no. You can do much better than this.
Individual analysis:
Gengar
Quiet removes one big advantage of Gengar: its speed. With Quiet, you're left with a slow, frail Pokemon that will get KOed before it can launch a single attack. Timid is much better, Modest is acceptable too.
Destiny Bond is a must-have, since the AI will suicide itself on Gengar. Except in the Battle Castle, where getting KOed reduces your CP earned. In that case, you shouldn't be using Gengar.
Lanturn
Starmie does a much better job than Lanturn due to higher Speed and Sp. Att. If you're looking for a setup sweeper, use Calm Mind Suicune.
Tyranitar
First off, Tyranitar's only ability is Sand Stream. Larvitar/Pupitar will change its ability when it evolves.
Having 4 damaging moves warrants a Choice item. And a 4-move attacking set is not Tyranitar's best: it can use Dragon Dance too.
Stone Edge has been called "the worst attack in DPP" because it misses so often. Outrage does the same damage as a STAB Crunch, so it's redundant. Stick with Crunch and Earthquake. The remaining two move slots can be Dragon Dance and Substitute/elemental punch.
Lastly if you're using a Tyranitar, it'll help if you have something to take advantage of sandstorm, like Garchomp.
EV wise, for sweepers or defensive setup Pokemon, use a 252/252/6 set. For Pokemon with priority moves, like Scizor, put enough speed to outrun things that need to be KOed by their non-priority moves (e.g. Scizor needs 98 Speed to outrun Heatran and OHKO with Superpower/Brick Break), and dump the rest in defenses.