SOunds like it would overcomplicate and add analysis paralysis in whether or not to spend tokens etc.
Though, of many possible solutions for TLTs specifically, the idea of pooling both defence rolls against the TLT attacks is potentially interesting - i.e. they roll both attacks, you roll all your defence dice and if you can cancel all of 1 attack, you take 1 damage, or all of both, you take no damage.
There's little more frustrating against TLTs than rolling 8 defence dice with soontir or similar and getting 4 evades on one and none on the other when a total of four between them distributed more evenly would have saved a hit - especially when you end up in the situation where your Evade token cannot help you even though you took the action to get it..
That was the entire point of tlts. To be able to put SOME dmg through to token stacking aces. The problem is that tlt is also deadly to everything else. Tlt should have been limited to a max of 2 per squad. Limit the amount of tlts, don't change the defence die.