Obsidia
Spam skill 1 and rapid basic attacks to stack damage quickly, start with Magic boots for cooldown, Corrosion scythe for attack speed and slow, DHS or sea halberd for damage or anti-heal, Golden staff for stronger on-hit effects, then finish with Malefic Gun for range and rose gold meteor for shield, while swapping to haas' claws for lifesteal sustain or blade of despair for massive damage if ahead.
Obisdia emblem
Placing Swift in the first slot is self-explanatory. You need as much attack speed as you can get without compromising on damage. The second slot can be Weapons Master to further increase Obsidia's damage, including her Bone Shard attacks. For the final slot, go for the Weakness Finder for the on-hit slow and attack speed reduction effect.
Battle Spell
Purify is ideal against teams with a lot of crowd control
Obsidia
The most common mistake marksmen players make is to be first in line in the team fight. Obsidia has little to no escape mechanics, with only Skill 2: Phantom Shadowmeld being her means of mobility. Always wait for your ally fighters and tanks to charge in first before committing to a fight.
Best With Angela
depends on your team
Watch Out For Lesley
its depends on your skill