ISIC is a subject of controversy. He is still considered S-Tier by the top tier of players, but for the majority of BB players he’s a non-entity. He’s got a lot of different options, which may be why he is so high-learning curve, combined with slow movement and a large frame.
He does have pronounced melee weaknesses, but his ability to control the range game can be startling. Timing is a huge issue with ISIC. @epicender584 makes a good point about being the .5 for all the 1 vs. 1’s. Intercede, aid, cover.
I’ve seen Omega Strike single-handedly halt the strongest pushes, or slice ahead through an Incursion lane like a hot knife through butter. He needs supported when he goes into tank mode; good harassers keeping melee and CC targets off of him. It’s just so much fire he can direct downrange, all but the most stalwart resistance will crumble if he’s leading a well-coordinated push.
ISIC lacks the fundamental oomph to be a “bullet sponge” kind of tank. I’m not good with him, but the good ISICs I have seen have used him as part of a well-coordinated strategy. He’s a “team tank,” I suppose. He defies the standard image of the tank, which is out in the front, taking all the heat and smiling. Instead, he’s a brick that slides from engagement to engagement, applying just enough force and absorbing just enough damage to successfully carry that particular engagement.
This is why he’s a top-tier pick, I suppose; those players have that well-honed sense of exactly what level of force is required to win each battle.
I suppose there is something of a pattern; whenever I see an ISIC who’s not in a group with other players, he’s generally a bit of a pushover. If he’s linked up with other players in a group, especially if they’re all high-CR, he can be downright terrifying.