Adventurer Rings discussion

so if arans get a 105% crit rate with the critical ring if they use SE then its better for them to use the cruel ring which gives 5% ending up with 100% crit chance?

also the example you are giving would sound to me like the first theory

edit:
with the second theory i meant (for examply for my aran)

30% x 90% chance = 27% chance on normal damage
30% x 10% chance = 3% chance on ring crit on normal damage
70% x 10% chance = 7% chance on ring crit on normal crit
70% x 90% chance = 63% chance on normal crit without ring crit

this is using 70% base crit without any other critical source but the critical ring

You'd still probably want to go with the critical ring though. More often than not, you don't have both combo above 100 and sharp eyes on.