So I actually shouldn't be posting this here 'cause it's potentially broken but a flash fire Typhlosion's eruption in the burning field has a base power of 506.25 when at full health on a neutral hit. To put it into context, that around 1.4x stronger than a super effective, stab close combat or brave bird.
All you need is a grass starter to set up grass pledge, then a fire starter to set off the burning field with fire pledge, then bring Typhlosion in on a free switch somewhere.
Someone scarf that thing.