Guild Wars 2

Say I have a 2s stun. If I use rune of mesmer (33%) and sigil of paralyzation (15%). That would be:

2s * (1.48) = 2.96s

So rounds up to 3s?
___________________________________________________
And say the stun is originally 1s. Again, same runes and sigils applied.

1s * (1.48) = 1.48s

That rounds down to 1s and the runes and sigils don’t actually help?

http://wiki.guildwars2.com/wiki/Sigil_of_Paralyzation

The duration increase of various stun and daze effects vary wildly and often round up to the next second.

There doesn’t seem to be a clear answer on that