Doesn't add, but it does receive bonuses from syngery
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Skill level cannot be increased, but equipping multiple Chances to Cast of the same skill, level and event will result in the individual percentages being added together to apply a single Chance to Cast of that skill, level and event (although >100% Chance to Cast is redundant).
Skills used receive passive bonuses including synergy bonuses, but they do not apply bonuses to other skills.
Quote (Wisteria @ Feb 26 2019 06:54pm)
U need a straight pt into valk for peace valk to stay, or despawns after few seconds
This. Because of this:
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The existence of pets summoned will be unstable unless player invests skill points in the native skill or acquires it from an oskill. Pets will not be summoned by mercenary.
Credit:
https://www.theamazonbasin.com/wiki/index.php?title=Chance_to_Cast