Jaehaerys I 3 sons

Let’s say Jaehaerys I eldest son Aegon lives.
In 83 AC after Morions Folly where Jaehaerys I and his THREE sons could burn the dornish at sea. He would have Casus Belli to clear out the stepstones like canon due to them helping Morion Martell or attacks on westerosi trade. If this was attempted and spiraled into war with the free cities or atleast a reformed Triarchy. What could the crowns maximalist goals be and the minimum? Mind you Aegon would ride Balerion, Aemon Caraxes, and Baelon Vhagar.
Am I wrong to think that with a relatively small expeditionary force Jaehaerys I 3 eldest sons could take atleast the stepstones and Tyrosh and maybe even Myr and Lys?