You keep using the same argument over and over again, even when it has been proven wrong multiple times. ISIC is one of, if not THE most powerful character in the game, seriously, he is extremely strong. Lets just look at the numbers real quick shall we? Lets compare the tanking abilities of Boldur versus the tanking abilities of ISIC, after comparing these I will also compare the utility and damage output of both characters. Numbers used are going to be based off of level 10(to begin with). At level 10, ISIC has a base health(and base shield) of 2,525 without gear or helix options, now lets look at boldur. At level 10, Boldur has a health pool of 2,525 base without gear or helix options. Now lets look at adding helix options to that. With helix options, ISIC gets put up to 2,765 and Boldur up to 3,245. Now lets look at skills and passives. They both have a shield that can block up to 1000 damage, and both can be upgraded to block 2000 this will be added at the end as its the same for both and makes little difference as such. At level 10, rotating wards(with the correct helix options, and overcharged) can block 1,735 damage, bring ISIC up to 4,500 against ranged attacks. With rage it is possible for Boldur to get up to 50% damage reduction for 8 seconds which brings the amount of damage needed to kill Boldur up to 4,867.5. Now lets look at ultimates and level 10 helix choices. At level 10, ISIC does 479.4 dps with his ultimate, and gets a 2000 health shield in front of him that refreshes every 6 seconds for the 40 second duration. Boldurs ultimate makes him get 50% of the damage dealt to his shield as health. Both of his level 10 helixs are very useful on paper, but not as good in reality. Lets look at axe mastery real fast shall we? Axe mastery gives Boldur 64% extra damage if he is at full health and has axe runes on, shield mastery makes his shield unbreakable if he has runes on. How often are you going to be able to burst someone down while you are at full health? Shield mastery seems really good, but if your team comp has any kind of hard cc at all, its basically useless, on top of the fact that you should be Boldur dashing often. Now lets be put in a situation shall we?
Boldur starts at full health, gets dived on and pushed into a corner. Lets even say he has both runes. He is getting permanently body blocked in the corner, he can sit there blocking for a while, but any kind of AoE damage goes through his shield. He then tries to dash out(removing his rune) and pushes someone back but now has the entire team able to attack him without his shield rune up. Sounds like a great place right?
ISIC starts at full health, gets dived on and pushed into a corner, he dashes out and stuns everyone long enough for him to get to safety
As you can see from purely the numbers, ISIC is a very good character in his own sense, we didnt even talk about the fact that his dps is the third highest in the game at level one or the fact that most of his damage is AoE.
So please, stop attacking people, and please start actually think about what you are saying before you say it.