User blog comment:Milesprower2/My thoughts on GW2/@comment-5792287-20160409125434

Welp, I came up with a stupidly good strategy for Flag of Power as Zombies. IDK how it would hold up on difficulties higher than Normal, but on Normal I survived for absolutely ages without reinforcement crates or bots.

The only weaknesses this strategy has are stunning abilities/freezing, Goatify (which is what made me lose in the end), and knockback-inducing attacks. If you throw in some friend with a really powerful zombie to back up the Scientist, like an All-star for example, you could probably survive for infinitely long. Especially since the All-star can break open reinforcement crates for you.
 * 1) Pick Chemist. Other Scientists might work but Chemist has great damage potential and AoE.
 * 2) Equip the following abilities: Heal Station, Energy Warp, Mega Heal Bomb.
 * 3) Use Heal Stations whenever you're low on health but there are relatively few zombies around.
 * 4) Throw Heal Bombs at the flag and stay close to it to heal when under attack from loads of bosses.
 * 5) If no healing abilities are available and you're low on health, use Energy Warp to stay near the flag while unkillable. Good for stalling until abilities recharge.
 * 6) And don't forget to keep spamming your Beaker Blaster constantly at the enemies!