First, sell or repurpose the mini split. Second, because the lights are vertical instead of horizontal you will need 50% more ventilation than a vertical light scenario of comparable wattage.Why? Because vertical bulbs are hung lower and the hotspots around them will be closer and in greater contact with lateral canopy zone. I ran a 3000 w vertical tree grow for my first op, according to King Heaths recommendation (back when a site known as cannaseedcollective.ca was up and running). I started it with 2-10" can filter combos and I had to upgrade to 3 to keep heat at acceptable levels. When I ran 4-3600w rooms with 6-600w each I installed 3-10" combos but only needed to use 2 as long as outside temps stayed around 80 or less. 600 more watts yet 50% less ventilation with the same ambient. The reason why I say you should ditch the mini split is because you will not be able to have mass quantities of fresh air being expelled. Ventilation isn't only about keeping it cool, it's also about fresh air. A bit off topic, but relevant: the root zone also needs massive quantities of fresh air via water/air interface super agitation.
