If the sole purpose of my Tyranitar is to be a primary attacker is it worth taking over level 30?
I don't intend to put it up in a gym due to better defenders & too enjoyable of a attacker to be stuck in a gym lol. Is the cost worth it past level 30?
Answers
I never felt badly about Dragonite and Snorlax since they are dual purpose defense and offense. There are plenty of others I've taken past like my 100% Jolteon, a strong Lapras, just because they are so useful and can often be used to great advantage through multiple defenders of the same type. I agree with the other poster in that you should see how often you use him and see if he fits that catagory since it is an enormously expensive move that on paper is hard to justify but in reality is really fun when done with the right mons.
Attackers I have taken above 30 that I still use semi-regularly:
Vaporeon Hydro Pump
2 Vaporeon Aqua Tail (both currently sitting in gyms, a third at lv26 and 96% that I am thinking of powering)
Venusaur Vine Whip/Solar Beam
Jolteon Thunderbolt
Gyarados Bite/Hydro Pump
Exeggutor Confusion/Solar Beam
Exeggutor Zen Headbutt/Solar Beam
Snorlax Lick/Body Slam
Lapras Ice Shard/Blizzard
If you are big on dodging, Crunch is nothing like a DC Dragonite. DC takes 1.7 seconds. It's less than 2 seconds, so you can squeeze it in between any defender's attack with out taking a hit. Crunch is 3.2 seconds -- almost twice as long. You'll get hit every time with Crunch, which will be quite often since it is a quick to charge 3-bar attack. If the defender has difficult to predict charge moves, you'll likely get hit by charge moves as well. However, if you don't dodge or only dodge charged moves, then you'll see much less of difference.
If it were me, I'd hold out for a B/SE to power up as an attacker (no need to power up defenders beyond level 30 in my meta since Tyranitar is ~3100 CP at level 30). However, if you don't dodge or only dodge charged attacks, then you'll see much less of a difference, and B/C may be fine.
I assume a key purpose of your Tyranitar will be a Blissey slayer. If you use calcs/sims or the damage equation on this site, you'll see that your Tyranitar's Bite attack is right on the border between doing 4 damage and doing 5 damage against Blissey. If you power it up to the point where it will do 5 damage, then you'll go through Blisseys much faster than with 4 damage. This specific level required for this depends on both your attack IV and the the level of the Blisseys that are defending, so it's difficult to give a general answer,.