Indestructibility granting options to counter destroy effects are the flexible Boros Charm, Heroic Intervention, and Rootborn Defenses
What kinds of trolls do you want to see in future sets
Its still a beast for casual Commander games if your playgroup allows it
Joshua, Phoenixs Dominant / Phoenix, Warden of Fire
Double-sleeving might sound silly at first, but double-sleeved cards always come out safe while a single-sleeved card might still suffer when you look at the results between two cards that were put to the test
Either you played it normally or you could have it come into play with a +1/+1 counter and it gained "must attack each turn if able." My one suggestion was to shift the negative from the red "must attack" to the black "can't block." I felt that it would be better flavor, would play better, and would create fewer bad feelings for the players (as a rule, players dislike when their creatures are forced to do dumb things that get them killed)