You can use the macro and still hit every positional, you'll just have to have a hotbar (I call it the "CD bar") where you place wheeling and fang/claw. Whichever one lights up is the one you need to position for.

Though tbh it makes MUCH more sense if Chaos Thrust always procced Wheeling (since CT is rear) and Full thrust always procced Fang/Claw.

Positionals are one thing but random positionals are quite stupid.

Another possiblity is for it to alternate between wheeling and fang/claw, so you can prepare for the positional.