You should learn more about AST then, since if we are talking about a DF where you can be 46 in, that is the first place an AST can manage cards properly, in other words this is SE's shortcoming and the AST might not know better they have all the tools to use to buff people now. The reason is redraw, without that, it is hard to give AoE buffs, what is the point of AoEing ewer because the game makes you without redaw?
It took me a long time to learn AST and how to give effective buffs, in fact I had to be couched by a friend. It is not easy to pick up how to make it effective.
If they happen to be 44 there, or just hit 45 there, meaning no redraw since it is quested, then the person you are trying to kick is correct. It is hard for a new AST to focus on that while it does not do much because the lacking of redraw and putting too much on RNG to have something good. What you end up having is, if you get a card you can burn for aoe buff you do that, when if you get anything but balance you have to click it off since without redraw you are only having 2 chances, not 4 (if you spread), making hold(spread ability) weak without redraw. it is very hard to buff before having redraw.