ADC/support should never be bot lane now
- ADC and support can take Herald without jungler help.
- Top or jungle can solo Dragon
- neither top nor jungler can solo Herald
Ergo, ADC/support should always be top to push lanes hard/fast with Herald buff, and the solo lane should be bot.
Alternately, the mage should go top since mid usually can't solo anything, tank should go bot since he can solo Dragon, and adc/sup should be mid so they can take either objective.
Bot is currently the worst lane for duo.