Very simply, Sync's best survival guide as Sgt. Hammer.

Level 1 - Regeneration Master
This talent increases Sgt. Hammer's health regeneration rate which increases her survival rate. Whenever possible, grab the regen orb if there is no danger near you.

Level 4 - Focused Attack (Attack Build)
Using Sgt. Hammer's siege mode, she can keep aim of the enemy from afar with low harm to herself. Using this advantage, this talent will increase her damage output to the enemy heroes.

Level 4 - Vigorous Assault (Defend Build)
This talent is not the best talent to equip but if there is heavy damage, this talent will help supplement the high regen rate that Sgt. Hammer currently have.

Level 7 - First Aid
This talent is no doubt the best talent that Sgt Hammer have as it gives Sgt. Hammer burst heal every 60 seconds.

Level 10 - Napalm Strike
While BFG have capability to snipe and deal heavy damage to opponent, napalm strike have a higher AOE and MUCH lower cooldown than BFG. This makes it reliable to deal damage rather than to get a chance to snipe enemy heroes especially if you consider that Sgt. Hammer is a map siege than a assassin.

Level 13 - Giant Killer
While First Strike does give 1/4 of Sgt. Hammer's total damage, Giant Killer is more viable in the game as Sgt. Hammer is not going to be left unscathed especially with the high amount of assassins in the game. Giant killer serves a good damage buff against tank heroes. This makes the enemy team fall faster.

Level 16 - Graduating Range
This talent is only viable if your opponent cannot one shot you and you have been picking up regen orbs correctly. It lets you snipe down enemies running away in your team fights AND the towers/core without taking heavy damage.

Level 20 - Nexus Frenzy
If you took Graduating Range, this talent is godsend. It lets you snipe down all the opponents near you as it increases YOUR attack speed AND range. God bless your opponents if you have a proper team defending for you.