Guild Wars 2

First of all , do these sigils such as Water/Frailty and Skale Venom proc on minions hits ?
Can both water & frailty sigils proc togather on the same weapon ( staff ) or there cooldowns will interfere ?

Minion hits do not proc sigils or consumables. As for multiple sigils proccing together, yes, that can happen. Their cooldowns are independent, unless it’s two of the same sigil.

But it said in the wiki that runes proc on pets( minions ), won’t the same apply to sigils/consumables ?

Do minions proc runes? Dolyak, for instance

I think mini s do probably runes actually. I know they did at one point but I don’t know if it was changed. I actually they it was changed awhile back now that I’m thinking about it

https://wiki.guildwars2.com/wiki/Rune#Notes

The minions do not proc any runes or sigils, because they do not have any runes or sigils, you using their active heal/elite skills procs it. Minions themselves only proc whatever they are given through minion specific traits and AoE buffs, in addition any condition applied by a minion in any way is treated as though you applied it.

As a side note, the wiki isn’t fully correct on all things minions, because very few players even understand how they work.