[yiran]

Breloom was my favourite pokemon competitively.

So, the choice of Poison Heal or Techinician?

One major factor is Bullet seed.

There is a 3/10 chance for it to hit 2 or 3 times, 2/10 times for it to hit 4 or 5 times.
The average. Calculated without STAB and Technician, then added Technician.

50x3+75x3+100x2+125x2
=150+225+200+250
=825

Average = 82.5

2.5 over Seed Bomb.

Yeah, it's overhyped, and unreliable.

However, Technician Adamant Mach Punch vs Neutral 0/0 Doryuuzu

Regular Poison Heal Adamant Mach Punch vs Neutral 0/0 Doryuuzu

Someone calculate those (the computer I'm using right now is messed up)

Use Spinda for the calculation. Same Defense.