Bingo.
Okay.
Pulse shielding: I need to know what you want done about it. I mean, do you think it's not effective as he claimed, not effective at all, pragmatically unfeasable, etc...
The effectiveness of his boarding parties: Is he roleplaying their advance through the ship? Then roleplay trying to stop them. It's reasonable to assume that his boarding parties of ten might be down to 6 or 4 guys by now, but that they're making their way into the belly of your ship. Your arguement that you have an unbreachable position, Telan, is without weight. Those are breach teams; they know what to do. While they haven't disabled your ships yet, there is the distraction that, unchecked, they very well might.
Dolash; where did you intend to take the boarders, anyway?
As far as Telan shooting past Dolash to get to the planet... well, kinda, yeah. Dolash's points about range make it impossible for you to hit the planet intermingling with his forces. However, you have made a tactical counterance to try and keep his forces from regrouping behind, so a compromised position is in order for both fleets...
Dolash's fleet has reformed behind Telan's with light and medium cruiser only. The faster, more manueverable ships were quick and lithe enough to get the superior position afforded by Telan's charge. Telan's containment was effective and Dolash is trapped in his broadsides with heavy cruisers and battleship. A few medium cruisers stagger behind, taking a considerable beating from Telan's heavy cannons.
Acceptable losses: Left to you to determine based on how your fleets are now positioned. Telan has some serious trouble as he tried to contain Dolash's fleet with fighters, of which he won't have many left. Dolash was in Telan's broadsides for a bit and still has some ships trapped there, and feels the power of the Imperial guns. Telan, meanwhile, has given his back to Dolash, who though in a somewhat limited period, accepted the invition to begin working over his fleet. Manifest that into reasonable losses and that should just about cover it, I believe.