The ideal method for compost potted plants with both watering and feeding is to use a wet/dry cycle, this gives the healthiest root system and in turn a very healthy plant, healthy plants give the optimum yield.
Composts should not be compressed when potting up, they are made to have an ideal crumb structure and in turn water/air holding capacity when just tapped to settle them when potting up, not firming by pushing with fingers squashing the compost into the pot. I would suggest filling the pots to the brim after tapping the pot on the bench, the compost will settle further under its own weight and watering, but as the roots rapidly fill the compost they stabilise compression keeping the water air holding capacity to near optimum. If the pots are too lightly filled its easy to top them off after a few days with a little more compost.
Water/feeding should be to the saturation capacity of the compost rootball, Ideally water/feed through the top of the compost slowly using a fine rose so all the compost is wet to its saturation point, keep watering until the pot tray has about an inch of run through in it, often the core of the root ball will not be saturated even when the pot tray is full, so leave it standing for half an hour gradually capillary action will draw up the liquid until the compost is saturated to its capacity right to its core and all the roots are bathed in nutrients if all the liquid is drawn up water through some more until no more water is drawn up, then tip out the saucers.
The compost should not be watered again until it is nearly dry! At this point there will be a build up of stale and toxic gasses in the compost, it is best to water with a fine rose over the entire the compost surface until you get run through, this oxygenates the water/feed when applied, it also drives stale and toxic gasses down through the rootball drawing in fresh air as it drains giving an aerobic healthy root zone.
While you can bottom feed/water but its much more tricky and we see more problems with the root ball becoming anaerobic, this encourages bad root conditions where bacterial and fungal pathogenic diseases build up and damage the root system, you also get a build up of toxins.
Half an hour or an hour standing in run through does not make the rootball anaerobic!