for spells start with Q,W,E - then max out W first as it helps with survivability, then Q, then E

build solari first, then according to your need either first steraks or armor/magic resist

if there are many pesky slippery enemies you can use frost gauntlet or shurelias battlesong instead of solari

play like a support, watch out for allies and protect them, try to anticipate the enemies and act accordingly

be creativy using sions abilities, you can really help team mates quite a lot

sions E can slow and reduce armor helping teammates kill or escape

the W can be used to tank damage for allies from an incoming spell or ult, or to slow down enemies