Go red/blue tree. Have an enormous supply of Gamma Burst items. During Gamma, everything will be taunted and your pet is unkillable/can’t die. Out of gamma burst, use a brainstormer/high pellet weapon to get your cooldown insta-reset with megavore. Repeat. Simple as that.
It’s really tedious to go super in-depth about skills. Lot of forum resources for you to use here, and many videos on YouTube of great builds. Gamma builds nowadays look almost exactly like a rakk attack build anyways.
Use meta weapons with gamma burst annoint. Maggie, brainstormer, wedding invitation, scourge, ion cannon, stagecoach, etc. Any shield but I recommend stop-gap. Have a hunter-seeker, maddening tracker, or pee grenade with 25% damage on throw.
& Yes, it’s as good as every other build. A rakk build will always do more damage, but have less survivability. It’s a trade-off. The new gamma annoint, with perfect gear, makes it only 60% less damage (115% during gamma + 25% dam on grenade throw) than a fully procced rakk build (100 ase + 50 ase + 50 ase). It’s all about keeping the cooldown low, having maximum uptime on gamma burst, and your pet (during gamma) will never go below 1 hp and everything will target it. It’s M4 certified, M4 True Takedown mode solo certified.