Good aim will take you a long way on this champion. Learn his range. Always have an escape plan. Understand how to win every matchup (will come with time). Use your mobility!
Androxus's high mobility and hitscan weapon give him significant advantages. You can try to lure him to a confined space to limit his mobility and make your weapon easier to hit with, and use Dead Zone to restrict his ability to heal.
Torvald has no way to prevent damage being dealt to him besides his personal shield. If you choose the Blastflower talent and buy Wrecker, he will be forced to either retreat to cover or quickly die.